NUCLEAR-SPIN RELAXATION IN S = 1 HEISENBERG ANTIFERROMAGNETIC CHAINS IN HIGH-FIELD

被引：5
|
作者：
GAVEAU, P
BOUCHER, JP
REGNAULT, LP
GOTO, T
RENARD, JP
机构：
[1] CEN,MDN,F-38041 GRENOBLE,FRANCE
[2] UNIV PARIS 11,INST ELECTR FONDAMENTALE,F-91405 ORSAY,FRANCE
[3] KYOTO UNIV,COLL LIBERAL ARTS & SCI,DEPT PHYS,KYOTO 606,JAPAN
来源：
JOURNAL OF APPLIED PHYSICS | 1991年 / 69卷 / 08期
关键词：
D O I：
10.1063/1.347828
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The proton spin-lattice relaxation rate 1/T1 has been measured in the two compounds Ni(C2H8N2)2NO2 (ClO4) (NENP) and [Ni(NO2)3N(CH3)4] (TMNIN), which provide good examples of S = 1 antiferromagnetic chains. Both the field H and the temperature dependencies are well analyzed in the framework of the Haldane conjecture. The prediction of a mode whose energy decreases with H is confirmed. The energy damping of this mode is observed to be also reduced by H. For both compounds, a possible energy renormalization is suggested as H approaches the critical field, where the spin system is expected to recover a magnetic behavior.
引用
收藏
页码：5956 / 5958
页数：3
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