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Antiferromagnetic resonance and high magnetic field properties of NaNiO2
被引：0
作者：
E. Chappel
M.D. Núñez-Regueiro
F. Dupont
G. Chouteau
C. Darie
A. Sulpice
机构：
[1] Grenoble High Magnetic Field Laboratory,
[2] CNRS and MPI-FKF,undefined
[3] BP 166X,undefined
[4] 38042 Grenoble,undefined
[5] France,undefined
[6] Laboratoire de Cristallographie,undefined
[7] CNRS,undefined
[8] BP 166X,undefined
[9] 38042 Grenoble,undefined
[10] France,undefined
[11] Centre de Recherches sur les Très Basses Températures,undefined
[12] CNRS,undefined
[13] BP 166X,undefined
[14] 38042 Grenoble,undefined
[15] France,undefined
来源：
The European Physical Journal B - Condensed Matter and Complex Systems
|
2000年
/
17卷
关键词：
PACS. 75.30.Et. Exchange and superexchange interactions - 76.50.+g Ferromagnetic, antiferromagnetic and ferrimagnetic resonances; spin-wave resonance;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Magnetisation measurements up to 23 T and submillimeter wave ESR in the frequency region 48-380 GHz have been performed on NaNiO2 powders at low temperature. Also typical spectra above the Néel temperature \documentclass[12pt]{minimal}
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\begin{document}\end{document} are shown. At 4 K the magnetisation shows a spin-flop transition at 1.8 T and saturation at 10 T. \documentclass[12pt]{minimal}
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\begin{document}\end{document}/Ni confirms the low spin state of the Ni3+ ions. The susceptibility exhibits a maximum at \documentclass[12pt]{minimal}
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\begin{document}\end{document} K with \documentclass[12pt]{minimal}
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\begin{document}\end{document} K. NaNiO2 is an A-type antiferromagnet: we derive \documentclass[12pt]{minimal}
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\begin{document}\end{document} K and \documentclass[12pt]{minimal}
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\begin{document}\end{document} K for the interactions between Ni ions within and between adjacent layers, respectively. The AFMR spectra yield an energy gap of 52.5 GHz, in agreement with the spin-flop value derived from the magnetisation. The anisotropy of the g factor observed at 100 K with \documentclass[12pt]{minimal}
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\begin{document}\end{document} can be attributed to the Jahn-Teller effect for Ni3+ ions in the low spin state, which stabilises the \documentclass[12pt]{minimal}
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\begin{document}\end{document} occupation. We finally comment on the isomorphic controversial Li1-xNi1+xO2 compound.
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页码：609 / 614
页数：5
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