Magnetic ordering in pyrochlore Ho2Mn2O7

N.P. Raju; J.E. Greedan; J.S. Pedersen; C. Simon; A. Maignan; A.M. Niraimathi; E. Gmelin; M.A. Subramanian

doi:10.1063/1.362063

Magnetic ordering in pyrochlore Ho₂Mn₂O₇

N.P. Raju, J.E. Greedan, J.S. Pedersen, C. Simon, A. Maignan, A.M. Niraimathi, E. Gmelin, M.A. Subramanian

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

Abstract

The magnetic susceptibility of Ho2Mn2O7 With a spontaneous rise below about 40 K and a paramagnetic Curie temperature of +39 K suggests a ferromagnetic ordering. Indeed neutron diffraction profiles show strongly enhanced Bragg peaks with a temperature dependence which indicates an apparent T-c approximate to 35 K. Nonetheless, the magnetic diffraction pattern is not consistent with a collinear ferro or ferrimagnetic ordering of the Ho3+ and Mn4+ sublattices. Furthermore, specific heat and small angle neutron scattering (SANS) show features which are also incompatible with conventional long-range order. (C) 1996 American Institute of Physics.

Original language	English
Journal	Journal of Applied Physics
Volume	79
Issue number	8
Pages (from-to)	6173-6175
ISSN	0021-8979
DOIs	https://doi.org/10.1063/1.362063
Publication status	Published - 1996
Event	40th Annual Conference on Magnetism and Magnetic Materials - Philadelphia, (PA), United States Duration: 6 Nov 1995 → 9 Nov 1995 Conference number: 40

Conference

Conference	40th Annual Conference on Magnetism and Magnetic Materials
Number	40
Country/Territory	United States
City	Philadelphia, (PA)
Period	06/11/1995 → 09/11/1995

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Cite this

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title = "Magnetic ordering in pyrochlore Ho2Mn2O7",

abstract = "The magnetic susceptibility of Ho2Mn2O7 With a spontaneous rise below about 40 K and a paramagnetic Curie temperature of +39 K suggests a ferromagnetic ordering. Indeed neutron diffraction profiles show strongly enhanced Bragg peaks with a temperature dependence which indicates an apparent T-c approximate to 35 K. Nonetheless, the magnetic diffraction pattern is not consistent with a collinear ferro or ferrimagnetic ordering of the Ho3+ and Mn4+ sublattices. Furthermore, specific heat and small angle neutron scattering (SANS) show features which are also incompatible with conventional long-range order. (C) 1996 American Institute of Physics. ",

keywords = "Materialer med s{\ae}rlige fysiske og kemiske egenskaber; Nye funktionelle materialer",

author = "N.P. Raju and J.E. Greedan and J.S. Pedersen and C. Simon and A. Maignan and A.M. Niraimathi and E. Gmelin and M.A. Subramanian",

year = "1996",

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T1 - Magnetic ordering in pyrochlore Ho2Mn2O7

AU - Raju, N.P.

AU - Greedan, J.E.

AU - Pedersen, J.S.

AU - Simon, C.

AU - Maignan, A.

AU - Niraimathi, A.M.

AU - Gmelin, E.

AU - Subramanian, M.A.

N1 - Conference code: 40

PY - 1996

Y1 - 1996

N2 - The magnetic susceptibility of Ho2Mn2O7 With a spontaneous rise below about 40 K and a paramagnetic Curie temperature of +39 K suggests a ferromagnetic ordering. Indeed neutron diffraction profiles show strongly enhanced Bragg peaks with a temperature dependence which indicates an apparent T-c approximate to 35 K. Nonetheless, the magnetic diffraction pattern is not consistent with a collinear ferro or ferrimagnetic ordering of the Ho3+ and Mn4+ sublattices. Furthermore, specific heat and small angle neutron scattering (SANS) show features which are also incompatible with conventional long-range order. (C) 1996 American Institute of Physics.

AB - The magnetic susceptibility of Ho2Mn2O7 With a spontaneous rise below about 40 K and a paramagnetic Curie temperature of +39 K suggests a ferromagnetic ordering. Indeed neutron diffraction profiles show strongly enhanced Bragg peaks with a temperature dependence which indicates an apparent T-c approximate to 35 K. Nonetheless, the magnetic diffraction pattern is not consistent with a collinear ferro or ferrimagnetic ordering of the Ho3+ and Mn4+ sublattices. Furthermore, specific heat and small angle neutron scattering (SANS) show features which are also incompatible with conventional long-range order. (C) 1996 American Institute of Physics.

KW - Materialer med særlige fysiske og kemiske egenskaber; Nye funktionelle materialer

U2 - 10.1063/1.362063

DO - 10.1063/1.362063

M3 - Conference article

SN - 0021-8979

VL - 79

SP - 6173

EP - 6175

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 8

T2 - 40th Annual Conference on Magnetism and Magnetic Materials

Y2 - 6 November 1995 through 9 November 1995

ER -