Magnetic entropy change of itinerant electron metamagnetic system Co (S1-x Sex) 2

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Abstract

The magnetic entropy change, Δ SM, of Co (S1-x Sex) 2 has been studied for 0≤x≤0.11. Compounds with 0.03≤x≤0.11 undergo a first-order magnetic transition and exhibit itinerant electron metamagnetism (IEM) just above the Curie temperature. We observed that the peak value of Δ SM shows a maximum at around x=0.07. The results are compared with the theoretically calculated results based on the spin fluctuation theory of IEM reported by Yamada and Goto. It is found that the experimental results are well described by the theoretical calculations. The origin of the peak of Δ SM is discussed from the thermodynamical point of view.

Original languageEnglish
Article number214407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume74
Issue number21
DOIs
Publication statusPublished - Dec 18 2006

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Metamagnetism
Entropy
entropy
Spin fluctuations
fluctuation theory
Electrons
Curie temperature
Electron transitions
electrons

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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title = "Magnetic entropy change of itinerant electron metamagnetic system Co (S1-x Sex) 2",
abstract = "The magnetic entropy change, Δ SM, of Co (S1-x Sex) 2 has been studied for 0≤x≤0.11. Compounds with 0.03≤x≤0.11 undergo a first-order magnetic transition and exhibit itinerant electron metamagnetism (IEM) just above the Curie temperature. We observed that the peak value of Δ SM shows a maximum at around x=0.07. The results are compared with the theoretically calculated results based on the spin fluctuation theory of IEM reported by Yamada and Goto. It is found that the experimental results are well described by the theoretical calculations. The origin of the peak of Δ SM is discussed from the thermodynamical point of view.",
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AU - Wada, Hirofumi

AU - Mitsuda, Akihiro

AU - Tanaka, K.

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N2 - The magnetic entropy change, Δ SM, of Co (S1-x Sex) 2 has been studied for 0≤x≤0.11. Compounds with 0.03≤x≤0.11 undergo a first-order magnetic transition and exhibit itinerant electron metamagnetism (IEM) just above the Curie temperature. We observed that the peak value of Δ SM shows a maximum at around x=0.07. The results are compared with the theoretically calculated results based on the spin fluctuation theory of IEM reported by Yamada and Goto. It is found that the experimental results are well described by the theoretical calculations. The origin of the peak of Δ SM is discussed from the thermodynamical point of view.

AB - The magnetic entropy change, Δ SM, of Co (S1-x Sex) 2 has been studied for 0≤x≤0.11. Compounds with 0.03≤x≤0.11 undergo a first-order magnetic transition and exhibit itinerant electron metamagnetism (IEM) just above the Curie temperature. We observed that the peak value of Δ SM shows a maximum at around x=0.07. The results are compared with the theoretically calculated results based on the spin fluctuation theory of IEM reported by Yamada and Goto. It is found that the experimental results are well described by the theoretical calculations. The origin of the peak of Δ SM is discussed from the thermodynamical point of view.

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