Magnetocalorific effect in amorphous and partially-crystallized Fe-Zr-Nb-Cu-B alloy

J. Gondro, K. Bloch, M. Nabiałek, Simon Walters

Research output: Contribution to journalArticle

Abstract

This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe82Zr7Nb2Cu1B8 alloy in the as-quenched and partially crystalline state. The microstructure was investigated using Mössbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fullyamorphous Fe82Zr7Nb2Cu1B8 alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission Mössbauer spectrum for the as-quenched Fe82Zr7Nb2Cu1B8 alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.
Original languageEnglish
Pages (from-to)606-607
Number of pages2
JournalActa Physica Polonica A
Volume127
Issue number2
DOIs
Publication statusPublished - 1 Jan 2015

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entropy
microstructure
Curie temperature
crystallization
magnetic properties
magnetization
annealing
curves
spectroscopy
temperature

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Gondro, J. ; Bloch, K. ; Nabiałek, M. ; Walters, Simon. / Magnetocalorific effect in amorphous and partially-crystallized Fe-Zr-Nb-Cu-B alloy. In: Acta Physica Polonica A. 2015 ; Vol. 127, No. 2. pp. 606-607.
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abstract = "This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe82Zr7Nb2Cu1B8 alloy in the as-quenched and partially crystalline state. The microstructure was investigated using M{\"o}ssbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fullyamorphous Fe82Zr7Nb2Cu1B8 alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission M{\"o}ssbauer spectrum for the as-quenched Fe82Zr7Nb2Cu1B8 alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.",
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Magnetocalorific effect in amorphous and partially-crystallized Fe-Zr-Nb-Cu-B alloy. / Gondro, J.; Bloch, K.; Nabiałek, M.; Walters, Simon.

In: Acta Physica Polonica A, Vol. 127, No. 2, 01.01.2015, p. 606-607.

Research output: Contribution to journalArticle

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T1 - Magnetocalorific effect in amorphous and partially-crystallized Fe-Zr-Nb-Cu-B alloy

AU - Gondro, J.

AU - Bloch, K.

AU - Nabiałek, M.

AU - Walters, Simon

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AB - This paper presents the results of an investigation into the: microstructure, magnetic properties and influence of annealing temperature on the magnetocaloric effect of Fe82Zr7Nb2Cu1B8 alloy in the as-quenched and partially crystalline state. The microstructure was investigated using Mössbauer spectroscopy. The magnetocaloric effect was observed as a change in the magnetic entropy, which was calculated from isothermal magnetization curves. Fullyamorphous Fe82Zr7Nb2Cu1B8 alloys, in the as-quenched state, exhibit a Curie temperature equal to (340±5) K. The transmission Mössbauer spectrum for the as-quenched Fe82Zr7Nb2Cu1B8 alloy is typical for weak ferromagnets with the average hyperfine field of 9.86(2) T. For this alloy in the as-quenched state, the changes in maximum magnetic entropy occur near the Curie points and are equal to 0.95 J/(kg K). Also, the maximum magnetic entropy changes decrease after partial crystallization.

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