On the role of Al doping in La0.7Ca0.3MnO3: A magnetic Compton scattering study

被引：8
|
作者：
Ahuja, B. L. [1 ]
Tiwari, Shailja [1 ]
Dashora, Alpa [1 ]
Mund, H. S. [1 ]
Sahariya, Jagrati [1 ]
Phase, D. M. [2 ]
Choudhary, R. J. [2 ]
Banerjee, A. [2 ]
Itou, M. [3 ]
Sakurai, Y. [3 ]
机构：
[1] ML Sukhadia Univ, Dept Phys, Udaipur 313001, India
[2] UGC DAE Consortium Sci Res, Indore 452001, Madhya Pradesh, India
[3] SPring 8, Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 06期
关键词：
TRANSPORT; PEROVSKITES; FIELD;
D O I：
10.1063/1.3624843
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Spin and orbital magnetic moments in hole doped manganite La0.7Ca0.3Mn1-xAlxO3 (x = 0, 0.02, and 0.06) have been scrutinized using experimental spin momentum densities. An analysis of magnetic Compton profiles shows that the spin moment of Mn 3d has a major contribution towards the total spin moment and its contribution decreases as we increase the concentration of Al. The present experiment along with magnetization data predict orbital moment of -0.29 +/- 0.03 mu(B)/f.u. in the parent compound (x = 0), which almost disappears on substitution of Al. The results are explained on the basis of imbalance in Mn3+ and Mn4+ charge ratio in these compounds. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624843]
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页数：3
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