The Effects of Mn Substitution on Magnetization Reversal Properties in Gd0.7Ca0.3MnO3

被引：20

作者：

Biswas, Sanjay ^{[1
]}

Khan, Momin Hossain ^{[1
]}

Pal, Sudipta ^{[1
]}

Bose, Esa ^{[2
]}

机构：

[1] Univ Kalyani, Dept Phys, Nadia 741235, WB, India

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

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2014年 / 27卷 / 02期

关键词：

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

D O I：

10.1007/s10948-013-2284-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Low temperature magnetization in polycrystalline Gd0.7Ca0.3Mn1-x M (x) O-3 (M=Cr, Ga, Ru; x=0, 0.2) has been investigated. The samples were prepared via the conventional solid state reaction method. For all the samples, the paramagnetic to ferrimagnetic (PM-FiM) transition temperature (say T (max)) can be well defined from the temperature dependent ac susceptibility data. The negative magnetization suppresses due to 20 % Cr or Ga doping at the Mn site. On the other hand, below the compensation temperature (T (comp)), the nature of the Ru doping sample is almost similar to that of undoped Gd0.7Ca0.3MnO3. The nonmagnetic Ga doping drastically reduces magnetization and T (max) shifts to a lower temperature. However, Ru and Cr doping increase the value of T (max). The network of canted Mn3+/Mn4+ moments changes with the substitution of Cr, Ga, and Ru at the Mn site giving rise to the variation of the internal magnetic moment. Thus, the antiparallel coupling of the Gd moments with Mn/M changes and affects the low temperature magnetization reversal properties.

引用

页码：463 / 468

页数：6

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