Kinetics of thermally induced first-order magnetic transition in La(Fe 0.88Si0.12)13 itinerant electron metamagnet

A. Fujita; H. Yako

doi:10.1016/j.jallcom.2012.01.069

Kinetics of thermally induced first-order magnetic transition in La(Fe _0.88Si_0.12)₁₃ itinerant electron metamagnet

A. Fujita, H. Yako

ENG - Materials Science

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

13 Citations (Scopus)

Abstract

A nucleation-growth phenomenon has been investigated in the thermally induced first-order transition between the ferromagnetic and paramagnetic states of La(Fe_0.88Si_0.12)₁₃ itinerant-electron metamagnetic (IEM) compound by measuring the AC susceptibility. Temperature dependence of the transition rate upon cooling exhibits a Johnson-Mehl-Avrami type variation and the Avrami exponent is determined to be 2.2. The thermal variation of the transition rate is scaled by the cooling rate, indicating that generation and dissipation of the latent heat are important for the kinetics of the growth process of the thermally induced transition.

Original language	English
Pages (from-to)	S48-S51
Journal	Journal of Alloys and Compounds
Volume	577
Issue number	SUPPL. 1
DOIs	https://doi.org/10.1016/j.jallcom.2012.01.069
Publication status	Published - 2013 Nov 15

Keywords

Itinerant-electron metamagnetic transition
Johnson-Mehl-Avrami model
Magnetocaloric effect
Nucleation and growth

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Kinetics of thermally induced first-order magnetic transition in La(Fe 0.88Si0.12)13 itinerant electron metamagnet",

abstract = "A nucleation-growth phenomenon has been investigated in the thermally induced first-order transition between the ferromagnetic and paramagnetic states of La(Fe0.88Si0.12)13 itinerant-electron metamagnetic (IEM) compound by measuring the AC susceptibility. Temperature dependence of the transition rate upon cooling exhibits a Johnson-Mehl-Avrami type variation and the Avrami exponent is determined to be 2.2. The thermal variation of the transition rate is scaled by the cooling rate, indicating that generation and dissipation of the latent heat are important for the kinetics of the growth process of the thermally induced transition.",

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AU - Fujita, A.

AU - Yako, H.

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Y1 - 2013/11/15

N2 - A nucleation-growth phenomenon has been investigated in the thermally induced first-order transition between the ferromagnetic and paramagnetic states of La(Fe0.88Si0.12)13 itinerant-electron metamagnetic (IEM) compound by measuring the AC susceptibility. Temperature dependence of the transition rate upon cooling exhibits a Johnson-Mehl-Avrami type variation and the Avrami exponent is determined to be 2.2. The thermal variation of the transition rate is scaled by the cooling rate, indicating that generation and dissipation of the latent heat are important for the kinetics of the growth process of the thermally induced transition.

AB - A nucleation-growth phenomenon has been investigated in the thermally induced first-order transition between the ferromagnetic and paramagnetic states of La(Fe0.88Si0.12)13 itinerant-electron metamagnetic (IEM) compound by measuring the AC susceptibility. Temperature dependence of the transition rate upon cooling exhibits a Johnson-Mehl-Avrami type variation and the Avrami exponent is determined to be 2.2. The thermal variation of the transition rate is scaled by the cooling rate, indicating that generation and dissipation of the latent heat are important for the kinetics of the growth process of the thermally induced transition.

KW - Itinerant-electron metamagnetic transition

KW - Johnson-Mehl-Avrami model

KW - Magnetocaloric effect

KW - Nucleation and growth

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