MAGNETIC-PROPERTIES OF ND2-XSRXNIO4+DELTA OXIDES

被引:1
作者
MARTINEZ, JL
ALONSO, J
FERNANDEZDIAZ, MT
RODRIGUEZCARVAJAL, J
VALLETREGI, M
GONZALEZCALBET, JM
机构
[1] UNIV COMPLUTENSE MADRID,RENFE,INST MAGNETISMO APLICADO,E-28230 MADRID,SPAIN
[2] CTR ETUD SACLAY,LEON BRILLOUIN LAB,F-91191 GIF SUR YVETTE,FRANCE
[3] UNIV COMPLUTENSE,FAC QUIM,DEPT QUIM INORGAN,E-28040 MADRID,SPAIN
来源
PHYSICA C | 1994年 / 235卷
关键词
D O I
10.1016/0921-4534(94)92006-0
中图分类号
O59 [应用物理学];
学科分类号
摘要
The system Nd2-XSrXNiO4+delta presents a rich variety and complex magnetic behavior depending on the Sr content and the oxygen stoichiometry. All the prepared samples were characterized by X-ray diffraction and the stoichiometry was carefully determined by thermogravimetric methods. We concentrate in a doping range from 0.2<X<0.8, and two set of samples, first as-grown (delta greater than or equal to 0), and second reduced (delta<0). The reduced samples present a weak maximum at high temperature (T-N1=330K) related to the antiferromagnetic ordering of the Ni sublattice. At low temperature there is also a maximum (5K<T-N2<17K) depending on the Sr content. The as-grown samples are characterized by a maximum in the magnetic susceptibility at low temperatures (T(max)approximate to 13-16K), and a clear departure from the linear Curie-Weiss behavior at much higher temperatures.
引用
收藏
页码:1561 / 1562
页数:2
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