Effect of inhomogeneity on magnetic, magnetocaloric, and magnetotransport properties of La(0.6)Pr(0.1)ACa(0.3)MnO(3) single crystal / Bebenin N. G.,Zainullina R. I.,Ustinov V. V.,Mukovskii Ya M. // JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - 2012. - V. 324, l. 6. - P. 1112-1116.

ISSN/EISSN:

0304-8853 / 1873-4766

Type:

Article

Abstract:

The effect of magnetic inhomogeneity on magnetic, magnetocaloric, and transport properties of the colossal magnetoresistance manganites with first order ferromagnetic-to-paramagnetic phase transition is studied. The experiments were performed on the single-crystalline samples of La0.6Pr0.1 Ca0.3MnO3. The inhomogeneity is described by the Curie temperature distribution function, which is found from the magnetization data. The temperature dependence of the magnetic field induced change in the entropy is shown to be determined by the distribution function and the shift of the transition temperature in a magnetic field. Similarly, magnetoresistance in the transition region is determined by the resistivity at H=0 and the shift of the transition temperature. The maximum entropy change as well as maximum magnetoresistance can be achieved in the magnetic field of order delta T-C/B-M where delta T-C is the transition width and BM is the rate of change of the Curie temperature with magnetic field. Our approach to analysis of the effects of inhomogeneity is general and therefore can be used for all compounds with the first order magnetic phase transition. (C) 2011 Elsevier B.V. All rights reserved.

Author keywords:

Manganite; Magnetic inhomogeneity; Magnetocaloric effect; Magnetoresistance MANGANITES; LA1-XCAXMNO3

DOI:

10.1016/j.jmmm.2011.10.043

Web of Science ID:

ISI:000298864100036

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAR
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-4766
Keywords-Plus	MANGANITES; LA1-XCAXMNO3
Research-Areas	Materials Science; Physics
Web-of-Science-Categories	Materials Science, Multidisciplinary; Physics, Condensed Matter
Author-Email	bebenin@imp.uran.ru
ResearcherID-Numbers	C, Y/G-5456-2010 Ustinov, Vladimir/G-7501-2011 Bebenin, Nikolay/K-6955-2013 Zainullina, Rimma/J-4287-2013
ORCID-Numbers	Ustinov, Vladimir/0000-0002-5155-7947 Bebenin, Nikolay/0000-0003-2035-6103 Zainullina, Rimma/0000-0002-0353-4775
Funding-Acknowledgement	RFBR {[}09-02-00081]; Presidium of RAS
Funding-Text	The authors are grateful to L.V. Elokhina for help in measurements. This work was supported by RFBR grant 09-02-00081 and Program of Presidium of RAS.
Number-of-Cited-References	19
Usage-Count-Since-2013	6
Journal-ISO	J. Magn. Magn. Mater.
Doc-Delivery-Number	873EO