ELECTRICAL AND MAGNETIC BEHAVIOR OF TRANSITION METAL OXIDES Ln0.7A0.3TMO3, Ln = La, Pr; A = Ca, Sr AND TM = Mn, Co

被引：5
作者：
Deac, I. G. [1 ]
Vladescu, A. [1 ]
Balasz, I. [1 ]
Tunyagi, A. [1 ]
Tetean, R. [1 ]
机构：
[1] Univ Babes Bolyai, Fac Fiz, Cluj Napoca 400084, Romania
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2010年 / 24卷 / 6-7期
关键词：
Manganites; Cobaltites; phase separation; spin disorder; SPIN-STATE TRANSITION; MAGNETORESISTANCE PROPERTIES; TRANSPORT-PROPERTIES; MIXED-VALENCE; MANGANITES; ORDER;
D O I：
10.1142/S0217979210064393
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a detailed magnetic study of the polycrystalline transition metal oxides Ln(0.7)A(0.3)TMO(3), Ln = La, Pr; A = Ca, Sr and TM = Mn, Co at low temperatures including electrical resistance, magnetization and ac susceptibility measurements. The effect of the A-site and B-site substitutions on the properties of these compounds is discussed. The results of this analysis indicate that the electrical and magnetic behavior of these compounds have some reminiscences of the manganites having similar formula, but the spin disorder and the grain boundary effects control the properties of these materials.
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页码：762 / 769
页数：8
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