Antiferromagnetic resonance in ferroborate NdFe3(BO3)4

被引：8
|
作者：
Kobets, M. I. [1 ]
Dergachev, K. G. [1 ]
Khatsko, E. N. [1 ]
Gnatchenko, S. L. [1 ]
Bezmaternykh, L. N. [2 ]
Temerov, V. L. [2 ]
机构：
[1] Natl Acad Sci, B Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] L Kirensky Inst Phys SB RAS, Krasnoyarsk 660036, Russia
来源：
PHYSICA B-CONDENSED MATTER | 2011年 / 406卷 / 18期
关键词：
Antiferromagnet; Resonance; Multiferroics; Commensurate-incommensurate phase; MICROWAVE;
D O I：
10.1016/j.physb.2011.06.014
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The AFMR spectra of the NdFe3(BO3)(4) crystal are measured in a wide range of frequencies and temperatures. It is found that by the type of its magnetic anisotropy the compound is an "easy-plane" antiferromagnet with a weak anisotropy in the basal plane. The effective magnetic parameters are determined: anisotropy fields H-a1 = 1.14 kOe and H-a2 = 60 kOe and magnetic excitation gaps Delta v(1) = 101.9 GHz and Delta v(2) = 23.8 GHz. It is shown that commensurate-incommensurate phase transition causes a shift in resonance field and a considerable change in absorption line width. At temperatures below 4.2 K nonlinear regimes of AFMR excitation at low microwave power levels are observed. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：3430 / 3435
页数：6
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