Evolution of magnetic properties in Cr doped manganites Gd0.7Ca0.3Mn1-xCrxO3 (x=0.0-0.5)

被引：30

作者：

Biswas, Sanjay ^{[1
]}

Khan, Momin Hossain ^{[1
]}

Pal, Sudipta ^{[1
]}

Bose, Esa ^{[2
]}

机构：

[1] Univ Kalyani, Dept Phys, Nadia 741235, W Bengal, India

[2] BPPIMT, Dept Engn Phys, Kolkata 700052, WB, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 328卷

关键词：

Manganites; Magnetic transition; Exchange interaction; Magnetization reversal; ORTHOCHROMITE; BEHAVIOR;

D O I：

10.1016/j.jmmm.2012.09.057

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Cr doping at the Mn site in Gd0.7Ca0.3MnO3 has been explored through detailed study of the magnetic properties. All the samples crystallize in orthorhombic structure with the Pnma space group. Replacement of the JahnTeller (JT) active Mn3+ ion by non-JT active Cr3+ ion causes increase in the value of the lattice parameter b. The paramagneticferrimagnetic (PMFiM) transition is marked by well-defined peaks (say at Tmax) in the temperature dependent ac susceptibility data for all the samples. The maximum value of susceptibility as well as the value of Tmax increases up to a Cr concentration (x=0.2) and then decreases with further Cr content. Interestingly, due to Cr substitution, the value of negative magnetic moment in field cooled (FC) process in Gd0.7Ca0.3MnO3 below the magnetic ordering temperature shifts gradually towards positive value and finally disappears. (C) 2012 Elsevier B. V. All rights reserved.

引用

页码：31 / 34

页数：4

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