Infrared study of neodymium-copper exchange interaction in Nd2CuO4

被引：20

作者：

Jandl, S ^{[1
]}

Richard, P

Nekvasil, V

Zhigunov, DI

Barilo, SN

Shiryaev, SV

机构：

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Acad Sci Czech Republ, Inst Phys, Prague 16253 6, Czech Republic

[3] Acad Sci Belarus, Inst Phys Solids & Semicond, Minsk 220072, BELARUS

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1999年 / 314卷 / 3-4期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Kramers doublets; Nd-Cu interaction; anisotropy;

D O I：

10.1016/S0921-4534(99)00178-1

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present an infrared transmission study of Nd2CuO4 Kramers doublets as a function of temperature and polarization. Lifting of the J = 9/2, 11/2, 13/2 and 15/2 Kramers doublets degeneracies of the order of few cm(-1) is observed which we ascribe to the exchange coupling of the Nd spins to the Cu subsystem. In particular, we show that the doublet splittings data retrace the Nd2CuO4 spin reorientation transitions and imply that the Nd-Cu coupling is strongly anisotropic. This finding supports a model used earlier to interpret the spin reorientation transitions as well as the spin-wave excitation gap data. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：189 / 195

页数：7

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