Investigation of Magnetocaloric Behavior of Nanocrystalline Nd0.67A0.33MnO3, (A = Ca, Sr, Ba and Pb)

被引：9

作者：

Sagar, E. ^{[1
]}

Kumar, N. Pavan ^{[1
]}

Krishna, D. C. ^{[2
]}

Reddy, P. Venugopal ^{[1
]}

机构：

[1] Osmania Univ, Dept Phys, Hyderabad 500007, Andhra Pradesh, India

[2] Bhavans New Sci Coll, Dept Phys, Hyderabad 500007, Andhra Pradesh, India

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2014年 / 27卷 / 09期

关键词：

Magnetocaloric effect; Magnetization; Magnetic entropy change; Relative cooling power; LA0.7CA0.3MNO3;

D O I：

10.1007/s10948-014-2543-y

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Colossal magnetoresistive (CMR) materials with the compositional formula, Nd(0.67)A(0.33)MnO(3) (where A = Ca, Sr, Ba, and Pb) in the nanocrystalline form were prepared by the PVA gel technique. After characterizing the samples structurally, a systematic investigation of magnetization has been undertaken, over a temperature range 10-300 K at 0.05 T magnetic field. An effort has been made to calculate the magnetocaloric behavior of all the samples theoretically using the experimental magnetization data. Other important parameters such as maximum entropy change, full width at half-maximum, relative cooling power, and maximum adiabatic temperature change under 0.05 T were also computed. The observed behavior has been explained qualitatively.

引用

页码：2067 / 2072

页数：6

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