Magnetic domains in a metamagnetic La(Fe0.90Si 0.10)13 refrigerant

N. Kawamoto; Y. Murakami; D. Shindo; K. Fukamichi; S. Fujieda; A. Fujita

doi:10.1063/1.2219006

Magnetic domains in a metamagnetic La(Fe_0.90Si _0.10)₁₃ refrigerant

N. Kawamoto, Y. Murakami, D. Shindo, K. Fukamichi, S. Fujieda, A. Fujita

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A thermally induced first-order magnetic phase transition in La(Fe _0.90Si_0.10)₁₃ has been observed in situ by using Lorentz microscopy in the Fresnel mode. On cooling the specimen, the magnetic domains instantly are formed at the Curie temperature T_C as in a fashion of the first-order phase transition. The coexistence of the ferromagnetic and paramagnetic phases was observed at T_C, and the phase boundary was confirmed to be located at the grain boundaries. In addition, the observed magnetic domain structure is reproduced without any change even after repeating thermal cycles in the vicinity of T_C. This fact strongly implies that the phase transition during thermal cycles does not induce lattice defects which cause serious deterioration.

Original language	English
Article number	043913
Journal	Journal of Applied Physics
Volume	100
Issue number	4
DOIs	https://doi.org/10.1063/1.2219006
Publication status	Published - 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.2219006

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title = "Magnetic domains in a metamagnetic La(Fe0.90Si 0.10)13 refrigerant",

abstract = "A thermally induced first-order magnetic phase transition in La(Fe 0.90Si0.10)13 has been observed in situ by using Lorentz microscopy in the Fresnel mode. On cooling the specimen, the magnetic domains instantly are formed at the Curie temperature TC as in a fashion of the first-order phase transition. The coexistence of the ferromagnetic and paramagnetic phases was observed at TC, and the phase boundary was confirmed to be located at the grain boundaries. In addition, the observed magnetic domain structure is reproduced without any change even after repeating thermal cycles in the vicinity of TC. This fact strongly implies that the phase transition during thermal cycles does not induce lattice defects which cause serious deterioration.",

author = "N. Kawamoto and Y. Murakami and D. Shindo and K. Fukamichi and S. Fujieda and A. Fujita",

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T1 - Magnetic domains in a metamagnetic La(Fe0.90Si 0.10)13 refrigerant

AU - Kawamoto, N.

AU - Murakami, Y.

AU - Shindo, D.

AU - Fukamichi, K.

AU - Fujieda, S.

AU - Fujita, A.

N1 - Funding Information: This research was partially supported by a Grant-in-Aid for Scientific Research (A), Grant No. 16206011, from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2006

Y1 - 2006

N2 - A thermally induced first-order magnetic phase transition in La(Fe 0.90Si0.10)13 has been observed in situ by using Lorentz microscopy in the Fresnel mode. On cooling the specimen, the magnetic domains instantly are formed at the Curie temperature TC as in a fashion of the first-order phase transition. The coexistence of the ferromagnetic and paramagnetic phases was observed at TC, and the phase boundary was confirmed to be located at the grain boundaries. In addition, the observed magnetic domain structure is reproduced without any change even after repeating thermal cycles in the vicinity of TC. This fact strongly implies that the phase transition during thermal cycles does not induce lattice defects which cause serious deterioration.

AB - A thermally induced first-order magnetic phase transition in La(Fe 0.90Si0.10)13 has been observed in situ by using Lorentz microscopy in the Fresnel mode. On cooling the specimen, the magnetic domains instantly are formed at the Curie temperature TC as in a fashion of the first-order phase transition. The coexistence of the ferromagnetic and paramagnetic phases was observed at TC, and the phase boundary was confirmed to be located at the grain boundaries. In addition, the observed magnetic domain structure is reproduced without any change even after repeating thermal cycles in the vicinity of TC. This fact strongly implies that the phase transition during thermal cycles does not induce lattice defects which cause serious deterioration.

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Magnetic domains in a metamagnetic La(Fe_0.90Si _0.10)₁₃ refrigerant

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