Effect of Dy substitution for La in La0.7Ca0.3MnO3 perovskite

被引：18
|
作者：
Yusuf, SM [1 ]
Ganguly, R
Chakraborty, KR
Mishra, PK
Paranjpe, SK
Yakhmi, JV
Sahni, VC
机构：
[1] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India
[2] Bhabha Atom Res Ctr, Novel Mat & Struct Chem Div, Bombay 400085, Maharashtra, India
[3] Bhabha Atom Res Ctr, Tech Phys & Prototypr Engn Div, Bombay 400085, Maharashtra, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 326卷 / 1-2期
关键词：
colossal magnetic materials; manganite perovskites;
D O I：
10.1016/S0925-8388(01)01218-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
AC susceptibility, resistivity and dc magnetization measurements on the (La0.757Dy0.243)(0.7)Ca0.3MnO3 perovskite reveal a clear departure from the well-behaved (collinear) ferromagnetic nature observed in the parent material La0.7Ca0.3MnO3 at low temperatures. Neutron diffraction structural study shows that the buckling of the MnO3 octahedra increases with the Dy substitution. This in rum gives a weaker double exchange (ferromagnetic) interaction, as the transfer integral, t(o), describing the hopping of e(g) electrons between Mn3+ and Mn4+ decreases resulting in the observed deterioration of ferromagnetism and metallic conduction. (C) 2001 Elsevier Science BY All rights reserved.
引用
收藏
页码：89 / 93
页数：5
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