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Critical behavior and magnetic entropy change in La0.7Ca0.3Mn0.9Zn0.1O3 perovskite manganite by T.L. Phan; P.Q. Thanh; N.H. Sinh; K.W. Lee; S.C. Yu is a Materials Science article available to read on EtoBox.

What is Critical behavior and magnetic entropy change in La0.7Ca0.3Mn0.9Zn0.1O3 perovskite manganite about?

We studied the critical behavior and magnetic entropy change in a perovskite-manganite compound of La 0.7 Ca 0.3 Mn 0.9 Zn 0.1 O 3 around its Curie temperature of T C 1⁄4 206.75 K. Experimental results revealed that the sample exhibited the second-order magnetic phase transition with the exponents b 1⁄4 0.474 and g 1⁄4 1.152 close to those expected from the mean-field theory (b 1⁄4 0.5 and g 1⁄4 1.0). In the vicinity of T C , the magnetic entropy change DS M reached maximum values of 1.1, 1.7, and 2.7 J/kg K under magneticfield variations of 10, 20, and 35 kOe, respectively. These DS M values are much lower than those reported previously on the parent compound of La 0.7 Ca 0.3 MnO 3 . The nature of this phenomenon is discussed by means of the characteristics of the magnetic phase transition, and critical exponents.

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Author

T.L. Phan; P.Q. Thanh; N.H. Sinh; K.W. Lee; S.C. Yu

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1567-1739)

Published

2011

Language

EN

Field

Materials Science (Physical Sciences)