TEMPERATURE-DEPENDENCE OF FE HYPERFINE FIELD IN RBA2CU3OZ

被引：17

作者：

NOWIK, I ^{[1
]}

KAINDL, G ^{[1
]}

BAUMINGER, ER ^{[1
]}

FELNER, I ^{[1
]}

KOWITT, M ^{[1
]}

YARON, U ^{[1
]}

机构：

[1] HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL

来源：

SOLID STATE COMMUNICATIONS | 1990年 / 74卷 / 09期

关键词：

D O I：

10.1016/0038-1098(90)90463-L

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Following the discovery that the Cu(2) sublattice in some RBa2Cu3O7 (R=rare earth) systems orders magnetically a series of 57Fe-probe Mossbauer studies have been performed aiming at the Cu(2) magnetisation and its Neel temperature. It is shown here that the observed temperature dependences of the Fe hyperfine field are identical for all systems studied to date, if the normalized field Heff(T)/Heff(OK) is plotted versus the reduced temperature (T/TN). This universal experimental curve can be reproduced within a molecular-field model calculation for a spin- 1 2 system, if it is assumed that the iron is trivalent (S = 5 2) and the Cu(2)-Fe exchange is only 0.26(1) of the Cu(2)-Cu(2) exchange in all cases. © 1990.

引用

页码：957 / 958

页数：2

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