Magnetocaloric effect in single crystal Nd2Co7 / Ilyn M.,Bartashevich M. I.,Andreev A. V.,Tereshina E. A.,Zhukova V.,Zhukov A.,Gonzalez J. // JOURNAL OF APPLIED PHYSICS. - 2011. - V. 109, l. 8.

ISSN/EISSN:

0021-8979 / нет данных

Type:

Article

Abstract:

Single-crystalline sample of Nd2Co7 (T-C 613 K) has been used to study ``anisotropic{''} magnetocaloric effect (MCE), originated from field induced rotation of the magnetic moment from easy-to hard-magnetization direction. Anisotropy constants were estimated using measured magnetization isotherms within 200-320 K temperature range, which encompasses two spontaneous spin-reorientation phase transitions. These data allow us to calculate the magnetic entropy and ``anisotropic{''} MCE using simple thermodynamic model. Thus obtained MCE was successfully compared with MCE calculated by means of the Maxwell relation. Main differences between ``anisotropic{''} MCE and MCE concerned with magnetizing of ferromagnetic substances near their Curie temperatures have been revealed. In spite of rather low characteristic values (Delta S = -0.005 MJ/Km(3), Delta T = 0.4 K at 235 K and Delta S = 0.005 MJ/Km(3), Delta T = -0.44 K at 250 K on the field change of 1 T) observed in Nd2Co7, intrinsic properties of the ``anisotropic{''} MCE were found to be rather good: it may be a flat function of temperature, rotation of the moment can be completed in the moderate fields, neither temperature nor field hysteresises has been observed. Furthermore, the peak values of the ``anisotropic{''} MCE are not limited by equation restricting MCE in the common ferromagnetic materials. (C) 2011 American Institute of Physics. {[}doi:10.1063/1.3563583]

Author keywords:

SPIN REORIENTATION; MAGNETOSTRICTION; GD-5(SI2GE2); TEMPERATURES; TRANSITION

DOI:

10.1063/1.3563583

Web of Science ID:

ISI:000290047000124

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	APR 15
Publisher	AMER INST PHYSICS
Address	CIRCULATION \& FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA
Language	English
Article-Number	083932
Keywords-Plus	SPIN REORIENTATION; MAGNETOSTRICTION; GD-5(SI2GE2); TEMPERATURES; TRANSITION
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	maxim.ilin@ehu.es
ResearcherID-Numbers	Tereshina, Evgeniya/G-7327-2011 Andreev, Alexander/B-6057-2011 Ilyn, Maxim/E-7604-2012
ORCID-Numbers	Ilyn, Maxim/0000-0002-4052-7275 Bartashevich, Mikhail/0000-0001-6853-2992 Zhukov, Arcady/0000-0001-5025-4859
Funding-Acknowledgement	Czech Science Foundation {[}GACR 202/09/0339]; Spanish Ministry of Education {[}NAN2004-09203-C04]; Basque Government {[}Saiotek S-PE09UN38]; Basque Government; EU {[}DEVMAG-MIWIRTEC (MANUNET-2007-Basque-3)]
Funding-Text	The work has been supported by the Czech Science Foundation (Grant No. GACR 202/09/0339). The work has also been supported by the Spanish Ministry of Education under the Grant No. NAN2004-09203-C04, by Basque Government under Grant No. Saiotek S-PE09UN38, and by Basque Government and by EU under Grant No. DEVMAG-MIWIRTEC (MANUNET-2007-Basque-3).
Number-of-Cited-References	30
Usage-Count-Since-2013	17
Journal-ISO	J. Appl. Phys.
Doc-Delivery-Number	756XB