Niels Bech Christensen

2023

Nanocriticality in the magnetic phase transition of CoO nanoparticles

Kamminga, M. E., Birk, J. O., Hjøllum, J., Jacobsen, H., Lass, J., Koch, T. L., Christensen, N. B., Niedermayer, C., Keller, L., Kuhn, L. T., Ulrikkeholm, E. T., Brok, E., Frandsen, C. & Lefmann, K., 2023, In: Physical Review B. 107, 6, 6 p., 064424.

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The magnetoelectric effect in LiFePO₄ – revisited

Fogh, E., Klemke, B., Pages, A., Li, J., Vaknin, D., Rønnow, H. M., Christensen, N. B. & Toft-Petersen, R., 2023, In: Physica B: Condensed Matter. 648, 4 p., 414380.

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2022

Crystal symmetry of stripe-ordered La_1.88Sr_0.12CuO₄

Frison, R., Küspert, J., Wang, Q., Ivashko, O., Zimmermann, M. V., Meven, M., Bucher, D., Larsen, J., Niedermayer, C., Janoschek, M., Kurosawa, T., Momono, N., Oda, M., Christensen, N. B. & Chang, J., 2022, In: Physical Review B. 105, 22, 8 p., 224113.

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Gradual emergence of superconductivity in underdoped La_2−xSr_xCuO₄

Tutueanu, A-E., Kamminga, M. E., Tejsner, T. B., Jacobsen, H., Hansen, H. W., Lacatusu, M-E., Baas, J., Eliasen, K. L., Grivel, J-C., Sassa, Y., Christensen, N. B., Steffens, P., Boehm, M., Piovano, A., Lefmann, K. & Rømer, A. T., 2022, In: arXiv. 12 p.

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Magnetic Bloch oscillations and domain wall dynamics in a near-Ising ferromagnetic chain

Hansen, U. B., Syljuåsen, O. F., Jensen, J., Schäffer, T. K., Andersen, C. R., Boehm, M., Rodriguez-Rivera, J. A., Christensen, N. B. & Lefmann, K., 2022, In: Nature Communications. 13, 1, 8 p., 2547.

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Single-domain stripe order in a high-temperature superconductor

Simutis, G., Küspert, J., Wang, Q., Choi, J., Bucher, D., Boehm, M., Bourdarot, F., Bertelsen, M., Wang, C. N., Kurosawa, T., Momono, N., Oda, M., Månsson, M., Sassa, Y., Janoschek, M., Christensen, N. B., Chang, J. & Mazzone, D. G., 2022, In: Communications Physics. 5, 7 p., 296.

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Uniaxial pressure induced stripe order rotation in La_1.88Sr_0.12CuO₄

Wang, Q., von Arx, K., Mazzone, D. G., Mustafi, S., Horio, M., Küspert, J., Choi, J., Bucher, D., Wo, H., Zhao, J., Zhang, W., Asmara, T. C., Sassa, Y., Månsson, M., Christensen, N. B., Janoschek, M., Kurosawa, T., Momono, N., Oda, M., Fischer, M. H., & 2 othersSchmitt, T. & Chang, J., 2022, In: Nature Communications. 13, 6 p., 1795.

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Unveiling Unequivocal Charge Stripe Order in a Prototypical Cuprate Superconductor

Choi, J., Wang, Q., Jöhr, S., Christensen, N. B., Küspert, J., Bucher, D., Biscette, D., Fischer, M. H., Hücker, M., Kurosawa, T., Momono, N., Oda, M., Ivashko, O., Zimmermann, M. V., Janoschek, M. & Chang, J., 2022, In: Physical Review Letters. 128, 20, 7 p., 207002.

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2021

Short-range charge density wave order in La1.88Sr0.12CuO4 under uniaxial pressure

Frison, R., Kuspert, J., Wang, Q., Christensen, N. B. C., Choi, J., Ivashko, O., Zimmermann, M. V., Kurosawa, T., Momono, N., Oda, M. & Chang, J., 2021, In: Acta Crystallographica Section A: Foundations and Advances. 77, S, p. C1233-C1233 PS-53-4.

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2020

High-Temperature Charge-Stripe Correlations in La_1.675Eu_0.2Sr_0.125CuO₄

Wang, Q., Horio, M., Von Arx, K., Shen, Y., John Mukkattukavil, D., Sassa, Y., Ivashko, O., Matt, C. E., Pyon, S., Takayama, T., Takagi, H., Kurosawa, T., Momono, N., Oda, M., Adachi, T., Haidar, S. M., Koike, Y., Tseng, Y-P., Zhang, W., Zhao, J., & 7 othersKummer, K., Garcia-Fernandez, M., Zhou, K-J., Christensen, N. B., Rønnow, H. M., Schmitt, T. & Chang, J., 2020, In: Physical Review Letters. 124, 18, 7 p., 187002.

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Magnetic structures and quadratic magnetoelectric effect in LiNiPO₄beyond 30 T

Fogh, E., Kihara, T., Toft-Petersen, R., Bartkowiak, M., Narumi, Y., Prokhnenko, O., Miyake, A., Tokunaga, M., Oikawa, K., Sørensen, M. K., Dyrnum, J. C., Grimmer, H., Nojiri, H. & Christensen, N. B., 2020, In: Physical Review B. 101, 2, 12 p., 024403.

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Temperature dependence of the (π,0) anomaly in the excitation spectrum of the 2D quantum Heisenberg antiferromagnet

Wan, W., Christensen, N. B., Sandvik, A. W., Tregenna-Piggott, P., Nilsen, G. J., Mourigal, M., Perring, T. G., Frost, C. D., McMorrow, D. F. & Rønnow, H. M., 2020, In: Journal of Physics Condensed Matter. 32, 37, 13 p., 374007.

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The instrument suite of the European Spallation Source

Andersen, K. H., Argyriou, D. N., Jackson, A. J., Houston, J., Henry, P. F., Deen, P. P., Toft-Petersen, R., Beran, P., Strobl, M., Arnold, T., Wacklin-Knecht, H., Tsapatsaris, N., Oksanen, E., Woracek, R., Schweika, W., Mannix, D., Hiess, A., Kennedy, S., Kirstein, O., Petersson Årsköld, S., & 159 othersTaylor, J., Hagen, M. E., Laszlo, G., Kanaki, K., Piscitelli, F., Khaplanov, A., Stefanescu, I., Kittelmann, T., Pfeiffer, D., Hall-Wilton, R., Lopez, C. I., Aprigliano, G., Whitelegg, L., Moreira, F. Y., Olsson, M. E., Bordallo, H. N., Martín-Rodríguez, D., Schneider, H., Sharp, M., Hartl, M., Nagy, G., Ansell, S., Pullen, S., Vickery, A., Fedrigo, A., Mezei, F., Arai, M., Heenan, R. K., Halcrow, W., Turner, D., Raspino, D., Orszulik, A., Cooper, J., Webb, N., Galsworthy, P., Nightingale, J., Langridge, S., Elmer, J., Frielinghaus, H., Hanslik, R., Gussen, A., Jaksch, S., Engels, R., Kozielewski, T., Butterweck, S., Feygenson, M., Harbott, P., Poqué, A., Schwaab, A., Lieutenant, K., Violini, N., Voigt, J., Brückel, T., Koenen, M., Kämmerling, H., Babcock, E., Salhi, Z., Wischnewski, A., Heynen, A., Désert, S., Jestin, J., Porcher, F., Fabrèges, X., Fabrèges, G., Annighöfer, B., Klimko, S., Dupont, T., Robillard, T., Goukassov, A., Longeville, S., Alba-Simionesco, C., Bourges, P., Guyon Le Bouffy, J., Lavie, P., Rodrigues, S., Calzada, E., Lerche, M., Schillinger, B., Schmakat, P., Schulz, M., Seifert, M., Lohstroh, W., Petry, W., Neuhaus, J., Loaiza, L., Tartaglione, A., Glavic, A., Schütz, S., Stahn, J., Lehmann, E., Morgano, M., Schefer, J., Filges, U., Klauser, C., Niedermayer, C., Fenske, J., Nowak, G., Rouijaa, M., Siemers, D. J., Kiehn, R., Müller, M., Carlsen, H., Udby, L., Lefmann, K., Birk, J. O., Holm-Dahlin, S., Bertelsen, M. G., Hansen, U. B., Olsen, M. A., Christensen, M., Iversen, K., Christensen, N. B., Rønnow, H. M., Freeman, P. G., Hauback, B. C., Kolevatov, R., Llamas-Jansa, I., Orecchini, A., Sacchetti, F., Petrillo, C., Paciaroni, A., Tozzi, P., Zanatta, M., Luna, P., Herranz, I., del Moral, O. G., Huerta, M., Magán, M., Mosconi, M., Abad, E., Aguilar, J., Stepanyan, S., Bakedano, G., Vivanco, R., Bustinduy, I., Sordo, F., Martínez, J. L., Lechner, R. E., Villacorta, F. J., Šaroun, J., Lukáš, P., Markó, M., Zanetti, M., Bellissima, S., del Rosso, L., Masi, F., Bovo, C., Chowdhury, M., De Bonis, A., Di Fresco, L., Scatigno, C., Parker, S. F., Fernandez-Alonso, F., Colognesi, D., Senesi, R., Andreani, C., Gorini, G., Scionti, G. & Schreyer, A., 2020, In: Nuclear Inst. and Methods in Physics Research, A. 957, 39 p., 163402.

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2019

Dzyaloshinskii-Moriya interaction and the magnetic ground state in magnetoelectric LiCoPO₄

Fogh, E., Zaharko, O., Schefer, J., Niedermayer, C., Holm-Dahlin, S., Sørensen, M. K., Kristensen, A. B., Andersen, N. H., Vaknin, D., Christensen, N. B. & Toft-Petersen, R., 2019, In: Physical Review B. 99, 10, 8 p., 104421.

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Strain-engineering Mott-insulating La₂CuO₄

Ivashko, O., Horio, M., Wan, W., Christensen, N. B., McNally, D. E., Paris, E., Tseng, Y., Shaik, N. E., Rønnow, H. M., Wei, H. I., Adamo, C., Lichtensteiger, C., Gibert, M., Beasley, M. R., Shen, K. M., Tomczak, J. M., Schmitt, T. & Chang, J., 2019, In: Nature Communications. 10, 8 p., 786.

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2018

Magnetoelastic phase diagram of TbNi₂B₂C

Toft-Petersen, R., Jensen, T. B. S., Jensen, J., von Zimmermann, M., Sloth, S., Isaksen, F. W., Christensen, N. B., Chen, Y., Siemensmeyer, K., Kawano-Furukawa, H., Takeya, H., Abrahamsen, A. B. & Andersen, N. H., 2018, In: Physical Review B. 97, 22, 8 p., 224417.

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Prototype of the novel CAMEA concept—A backend for neutron spectrometers

Markó, M., Groitl, F., Birk, J. O., Freeman, P. G., Lefmann, K., Christensen, N. B., Niedermayer, C., Jurányi, F., Lass, J., Hansen, A. & Rønnow, H. M., 2018, In: Review of Scientific Instruments. 89, 1, 13 p., 015105.

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Spin-Orbital Excitations in Ca2RuO4 Revealed by Resonant Inelastic X-Ray Scattering

Das, L., Forte, F., Fittipaldi, R., Fatuzzo, C. G., Granata, V., Ivashko, O., Horio, M., Schindler, F., Dantz, M., Tseng, Y., McNally, D. E., Rønnow, M., Wan, W., Christensen, N. B., Pelliciari, J., Olalde-Velasco, P., Kikugawa, N., Neupert, T., Vecchione, A., Schmitt, T., & 2 othersCuoco, M. & Chang, J., 2018, In: Physical Review X. 8, 1, 9 p., 011048 .

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Stability of charge-stripe ordered La₂−_xSr_xNiO_4+δ at one third doping

Freeman, P. G., Mole, R. A., Christensen, N. B., Stunault, A. & Prabhakaran, D., 2018, In: Physica B: Condensed Matter. 536, p. 720-725

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2017

Damped spin excitations in a doped cuprate superconductor with orbital hybridization

Ivashko, O., Shaik, N. E., Lu, X., Fatuzzo, C. G., Dantz, M., Freeman, P. G., McNally, D. E., Destraz, D., Christensen, N. B., Kurosawa, T., Momono, N., Oda, M., Matt, C. E., Monney, C., Rønnow, H. M., Schmitt, T. & Chang, J., 2017, In: Physical Review B. 95, 21, 8 p., 214508 .

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Field-induced reentrant magnetoelectric phase in LiNiPO₄

Toft-Petersen, R., Fogh, E., Kihara, T., Jensen, J., Fritsch, K., Lee, J., Granroth, G. E., Stone, M. B., Vaknin, D., Nojiri, H. & Christensen, N. B., 2017, In: Physical Review B. 95, 6, 8 p., 064421.

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Magnetic order, hysteresis, and phase coexistence in magnetoelectric LiCoPO₄

Fogh, E., Toft-Petersen, R., Ressouche, E., Niedermayer, C., Holm, S. L., Bartkowiak, M., Prokhnenko, O., Sloth, S., Isaksen, F. W., Vaknin, D. & Christensen, N. B., 2017, In: Physical Review B. 96, 10, 10 p., 104420.

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Spin excitations and quantum criticality in the quasi-one-dimensional Ising-like ferromagnet CoCl2·2D2O in a transverse field

Larsen, J., Schäffer, T. K., Hansen, U. B., Holm, S. L., Ahl, S. R., Toft-Petersen, R., Taylor, J., Ehlers, G., Jensen, J., Rønnow, H. M., Lefmann, K. & Christensen, N. B., 2017, In: Physical Review B. 96, 17, 6 p., 174424 .

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2016

Magnetic field controlled charge density wave coupling in underdoped YBa₂Cu₃O_6+x

Chang, J., Blackburn, E., Ivashko, O., Holmes, A. T., Christensen, N. B., Huecker, M., Liang, R., Bonn, D. A., Hardy, W. N., Rütt, U., Zimmermann, M. V., Forgan, E. M. & Hayden, S. M., 2016, In: Nature Communications. 7, 7 p., 11494.

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2015

Analysis of the crystallographic and magnetic structures of the Tb_0.1Pr_0.9Al₂ and Tb_0.25Pr_0.75Al₂ magnetocaloric compounds by means of neutron scattering

Tedesco, J. C. G., Carvalho, A. M. G., Christensen, N. B., Kockelmann, W., Telling, M. T. F., Yokaichiya, F., Toebbens, D. M., Simeoni, G. G., Cardoso, L. P., Coelho, A. A. & Bordallo, H. N., 2015, In: Journal of Materials Science. 50, 7, p. 2884-2892 9 p.

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Field-induced interplanar magnetic correlations in the high-temperature superconductor La_1.88Sr_0.12CuO₄

Rømer, A. T., Jensen, P., Jacobsen, H., Udby, L., Andersen, B. M., Bertelsen, M., Holm, S. L., Christensen, N. B., Toft-Petersen, R., Skoulatos, M., Laver, M., Schneidewind, A., Link, P., Oda, M., Ido, M., Momono, N. & Lefmann, K., 2015, In: Physical Review B. 91, 17, p. 174507 8 p.

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Fractional excitations in the square-lattice quantum antiferromagnet

Piazza, B. D., Mourigal, M., Christensen, N. B., Nilsen, G. J., Tregenna-Piggott, P., Perring, T. G., Enderle, M., McMorrow, D. F., Ivanov, D. A. & Rønnow, H. M., 2015, In: Nature Physics. 11, 1, p. 62-68 7 p.

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The microscopic structure of charge density waves in underdoped YBa₂Cu₃O_6.54 revealed by X-ray diffraction

Forgan, E. M., Blackburn, E., Holmes, A. T., Briffa, A. K. R., Chang, J., Bouchenoire, L., Brown, S. D., Liang, R., Bonn, D., Hardy, W. N., Christensen, N. B., Zimmermann, M. V., Hücker, M. & Hayden, S. M., 2015, In: Nature Communications. 6, 7 p., 10064.

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2014

CAMEA ESS: The Continuous Angle Multi-Energy Analysis Indirect Geometry Spectrometer for the European Spallation Source

Freeman, P. G., Birk, J. O., Marko, M., Bertelsen, M., Larsen, J., Christensen, N. B., Lefmann, K., Jacobsen, J., Niedermayer, C., Juranyi, F. & Ronnow, H. M., 2014, In: Journal of Physics: Conference Series (Online). 83, p. 03005 7 p.

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Competing charge, spin, and superconducting orders in underdoped YBa2Cu3Oy

Hücker, M., Christensen, N. B., Holmes, A. T., Blackburn, E., Forgan, E. M., Liang, R., Bonn, D. A., Hardy, W. N., Gutowski, O., Zimmermann, M. V., Hayden, S. M. & Chang, J., 2014, In: Physical Review B. 90, 5

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High-field re-entrance of the magnetoelectric effect in LiNiPO₄ investigated in pulsed fields

Fogh, E., Toft-Petersen, R., Nojiri, H., Kihara, T., E. Granroth, G., B. Stone, M., Lee, J., Fritsch, K., Andersen, N. H., Vaknin, D. & Christensen, N. B., 2014. 1 p.

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Magnetic High-Field Phases of Magnetoelectric LiNiPO₄

Fogh, E., Toft-Petersen, R., Nojiri, H., Granroth, G., Kihara, T. & Christensen, N. B., 2014. 1 p.

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Prismatic analyzer concept for neutron spectrometers

Birk, J. O., Marko, M., Freeman, P. G., Jacobsen, J., Hansen, R. L., Niedermayer, C., Christensen, N. B., Måsson, M., Rønnow, H. M. & Lefmann, K., 2014, In: Review of Scientific Instruments. 85, 11, 6 p., 113908.

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Quantum and thermal ionic motion, oxygen isotope effect, and superexchange distribution in La₂CuO₄

Haefliger, P. S., Gerber, S., Pramod, R., Schnells, V. I., dalla Piazza, B., Chati, R., Pomjakushin, V., Conder, K., Pomjakushina, E., Le Dreau, L., Christensen, N. B., Syljuasen, O. F., Normand, B. & Rønnow, H. M., 2014, In: Physical Review B Condensed Matter. 89, 8, 13 p., 085113.

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Rotated stripe order and its competition with superconductivity in La_1.88Sr_0.12CuO₄

Thampy, V., Dean, M. P. M., Christensen, N. B., Steinke, L., Islam, Z., Oda, M., Ido, M., Momono, N., Wilkins, S. B. & Hill, J. P., 2014, In: Physical Review B. 90, 10, p. 100510 5 p.

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2013

Glassy low-energy spin fluctuations and anisotropy gap in La_1.88Sr_0.12CuO₄

Rømer, A. T., Chang, J., Christensen, N. B., Andersen, B. M., Lefmann, K., Mähler, L., Gavilano, J., Gilardi, R., Niedermayer, C., Rønnow, H. M., Schneidewind, A., Link, P., Oda, M., Ido, M., Momono, N. & Mesot, J., 2013, In: Physical Review B Condensed Matter. 87, 14, p. 144513

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Measurement of unique magnetic and superconducting phases in oxygen-doped high-temperature superconductors La_2-xSr_xCuO_4+y

Udby, L., Larsen, J., Christensen, N. B., Boehm, M., Niedermayer, C., Mohottala, H. E., Jensen, T. B. S., Toft-Petersen, R., Chou, F. C., Andersen, N. H., Lefmann, K. & Wells, B. O., 2013, In: Physical Review Letters. 111, 22, p. 227001

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Phase diagram with an enhanced spin-glass region of the mixed Ising-XY magnet LiHo_xEr_1-xF₄

Piatek, J. O., Dalla Piazza, B., Nikseresht, N., Tsyrulin, N., Zivkovic, I., Krämer, K. W., Laver, M., Prokes, K., Matas, S., Christensen, N. B. & Rønnow, H. M., 2013, In: Physical Review B. 88, 1, p. 014408

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X-ray diffraction observations of a charge-density-wave order in superconducting ortho-II YBa₂Cu₃O_6.54 single crystals in zero magnetic field

Blackburn, E., Chang, J., Hücker, M., Holmes, A. T., Christensen, N. B., Liang, R., Bonn, D. A., Hardy, W. N., Rütt, U., Gutowski, O., Zimmermann, M. V., Forgan, E. M. & Hayden, S. M., 2013, In: Physical Review Letters. 110, 13, p. 137004

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2012

Direct observation of competition between superconductivity and charge density wave order in YBa₂Cu₃O_6.67

Chang, J., Blackburn, E., Holmes, A. T., Christensen, N. B., Larsen, J., Mesot, J., Liang, R., Bonn, D. A., Hardy, W. N., Watenphul, A., Zimmermann, M. V., Forgan, E. M. & Hayden, S. M., 2012, In: Nature Physics. 8, 12, p. 871-876

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2011

Analysing neutron scattering data using McStas virtual experiments

Udby, L., Willendrup, P. K., Bergbäck Knudsen, E., Niedermayer, C., Filges, U., Christensen, N. B., Farhi, E., Wells, B. O. & Lefmann, K., 2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 634, Suppl. 1, p. S138-S143

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ESS: en forskningsfacilitet i verdensklasse under opbygning i Lund

Lefmann, K., Arleth, L., Christensen, N. B., Pape Møller, S., Skelboe, S. & Willendrup, P. K., 2011, In: Kvant. 1, p. 25-32

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High-field magnetic phase transitions and spin excitations in magnetoelectric LiNiPO4

Toft-Petersen, R., Jensen, J., Jensen, T. B. S., Andersen, N. H., Christensen, N. B., Niedermayer, C., Kenzelmann, M., Skoulatos, M., Le, MD., Lefmann, K., Hansen, S. R., Li, J., Zarestky, J. L. & Vaknin, D., 2011, In: Physical Review B Condensed Matter. 84, 5, p. 054408 (10 pages)

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Magnetic Field-Induced Closure of the Spin Excitation Gap near Optimal Doping in La2-xSrxCuO4

Christensen, N. B., Chang, J., Razzoli, E., Bator, M., Niedermayer, C., Lefmann, K., Ronnow, H. M., McMorrow, D. F., Schneidewind, A., Link, P., Hiess, A., Boehm, M., Mottl, R., Pailhes, S., Oda, M., Ido, M., Momono, N. & Mesot, J., 2011, In: Physical Society of Japan. Journal. Supplement. 80, p. SB030

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Magnetic structure and spin dynamics of the quasi-one-dimensional spin-chain antiferromagnet BaCo2V2O8

Kawasaki, Y., Gavilano, J. L., Keller, L., Schefer, J., Christensen, N. B., Amato, A., Ohno, T., Kishimoto, Y., He, Z., Ueda, Y. & Itoh, M., 2011, In: Physical Review B Condensed Matter. 83, 6, p. 064421

Research output: Contribution to journal › Journal article › Research › peer-review

Spin liquid in a single crystal of the frustrated diamond lattice antiferromagnet CoAl2O4

Zaharko, O., Christensen, N. B., Cervellino, A., Tsurkan, V., Maljuk, A., Stuhr, U., Niedermayer, C., Yokaichiya, F., Argyriou, D. N., Boehm, M. & Loidl, A., 2011, In: Physical Review B Condensed Matter. 84, 9, p. 094403

Research output: Contribution to journal › Journal article › Research › peer-review

2010

Evolution of magnetic states in frustrated diamond lattice antiferromagnetic Co(Al1-xCox)(2)O-4 spinels

Zaharko, O., Cervellino, A., Tsurkan, V., Christensen, N. B. & Loidl, A., 2010, In: Physical Review B Condensed Matter. 81, 6, p. 064416

Research output: Contribution to journal › Journal article › Research › peer-review

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Field-induced Tomonaga-Luttinger liquid phase of a two-leg spin-1/2 ladder with strong leg interactions

Hong, T., Kim, Y. H., Hotta, C., Takano, Y., Tremelling, G., Turnbull, M. M., Landee, C. P., Kang, H-J., Christensen, N. B., Lefmann, K., Schmidt, K. P., Uhrig, G. S. & Broholm, C., 2010, In: Physical Review Letters. 105, 13, p. 137207

Research output: Contribution to journal › Journal article › Research › peer-review

Neutron scattering study of the magnetic phase diagram of underdoped YBa2Cu3O6+x

Haug, D., Hinkov, V., Sidis, Y., Bourges, P., Christensen, N. B., Ivanov, A., Keller, T., Lin, C. T. & Keimer, B., 2010, In: New Journal of Physics. 12, p. 105006

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The temperature evolution of the out-of-plane correlation lengths of charge-stripe ordered La1.725Sr0.275NiO4

Freeman, P. G., Christensen, N. B., Prabhakaran, D. & Boothroyd, A. T., 2010, In: Journal of Physics: Conference Series (Online). 200, p. 012037

Research output: Contribution to journal › Conference article › Research › peer-review

Niels Bech Christensen

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