Magneto-optical study on α′-NaV2O5 in high magnetic fields

被引：5

作者：

Takehana, K

Takamasu, T

Kido, G

Isobe, M

Ueda, Y

机构：

[1] Natl Res Inst Met, Tsukuba Magnet Lab, Tsukuba, Ibaraki 3050047, Japan

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

PHYSICA B | 2001年 / 294卷

关键词：

alpha '-NaV2O5; far infrared spectroscopy; magneto-optical measurements; charge ordering;

D O I：

10.1016/S0921-4526(00)00613-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Far-infrared magneto-optical studies were performed on alpha'-NaV2O5 up to 15 T. Magnetic absorption modes were observed at 68, 106 and 124 cm(-1) below the critical temperature, T-C = 34K, in E parallel toc configuration, and they exhibit softening towards T-C. Neither shifting nor broadening of these modes was observed in the presence of the magnetic field up to 15T, which suggests that these modes are caused by the excitation to the magnetic bound states. Besides the sharp absorption modes, a broad absorption band was observed on the spectra of E parallel toc. Its oscillator strength shows an anomalous decrease at T-C, which would be related to charge disproportion. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：79 / 82

页数：4

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