Synthesis and structural characterization of uranium-doped Ca2CuO3, a one-dimensional quantum antiferromagnet

Nam Nhat Hoang; Dang Chinh Huynh; Thuy Trang Nguyen; Duc Tho Nguyen; Duc-The Ngo; Michael Finnie; Chau Nguyen

doi:10.1007/s00339-008-4631-y

Synthesis and structural characterization of uranium-doped Ca₂CuO₃, a one-dimensional quantum antiferromagnet

Nam Nhat Hoang, Dang Chinh Huynh, Thuy Trang Nguyen, Duc Tho Nguyen, Duc-The Ngo, Michael Finnie, Chau Nguyen

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

Abstract

The technological settings of a modified sol-gel method for the preparation of highly fine homogeneous powder of Ca2CuO3 doped with uranium 238 (x= 0.0–0.05) is presented. The analysis of structure, purity of phases and the justification for the role of uranium in the given compounds are provided, together with an almost complete classification of the observed optical phonons by means of Raman, IR measurements and ab initio calculations. A significant reduction in particle size was achieved by doping, and a strong correlation between resistivity and doping concentration was observed and explained using the phonon-assisted electron hopping conduction model. The persistence of a covalent insulation state in all compounds is an interesting feature of this doping.

Original language	English
Journal	Applied Physics A
Volume	92
Issue number	3
Pages (from-to)	715-725
ISSN	0947-8396
DOIs	https://doi.org/10.1007/s00339-008-4631-y
Publication status	Published - 2008
Externally published	Yes

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title = "Synthesis and structural characterization of uranium-doped Ca2CuO3, a one-dimensional quantum antiferromagnet",

abstract = "The technological settings of a modified sol-gel method for the preparation of highly fine homogeneous powder of Ca2CuO3 doped with uranium 238 (x= 0.0–0.05) is presented. The analysis of structure, purity of phases and the justification for the role of uranium in the given compounds are provided, together with an almost complete classification of the observed optical phonons by means of Raman, IR measurements and ab initio calculations. A significant reduction in particle size was achieved by doping, and a strong correlation between resistivity and doping concentration was observed and explained using the phonon-assisted electron hopping conduction model. The persistence of a covalent insulation state in all compounds is an interesting feature of this doping.",

author = "Hoang, {Nam Nhat} and Huynh, {Dang Chinh} and Nguyen, {Thuy Trang} and Nguyen, {Duc Tho} and Duc-The Ngo and Michael Finnie and Chau Nguyen",

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T1 - Synthesis and structural characterization of uranium-doped Ca2CuO3, a one-dimensional quantum antiferromagnet

AU - Hoang, Nam Nhat

AU - Huynh, Dang Chinh

AU - Nguyen, Thuy Trang

AU - Nguyen, Duc Tho

AU - Ngo, Duc-The

AU - Finnie, Michael

AU - Nguyen, Chau

PY - 2008

Y1 - 2008

N2 - The technological settings of a modified sol-gel method for the preparation of highly fine homogeneous powder of Ca2CuO3 doped with uranium 238 (x= 0.0–0.05) is presented. The analysis of structure, purity of phases and the justification for the role of uranium in the given compounds are provided, together with an almost complete classification of the observed optical phonons by means of Raman, IR measurements and ab initio calculations. A significant reduction in particle size was achieved by doping, and a strong correlation between resistivity and doping concentration was observed and explained using the phonon-assisted electron hopping conduction model. The persistence of a covalent insulation state in all compounds is an interesting feature of this doping.

AB - The technological settings of a modified sol-gel method for the preparation of highly fine homogeneous powder of Ca2CuO3 doped with uranium 238 (x= 0.0–0.05) is presented. The analysis of structure, purity of phases and the justification for the role of uranium in the given compounds are provided, together with an almost complete classification of the observed optical phonons by means of Raman, IR measurements and ab initio calculations. A significant reduction in particle size was achieved by doping, and a strong correlation between resistivity and doping concentration was observed and explained using the phonon-assisted electron hopping conduction model. The persistence of a covalent insulation state in all compounds is an interesting feature of this doping.

U2 - 10.1007/s00339-008-4631-y

DO - 10.1007/s00339-008-4631-y

M3 - Journal article

SN - 0947-8396

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SP - 715

EP - 725

JO - Applied Physics A

JF - Applied Physics A

IS - 3