Exchange coupling in pure hcp Gd and magnetostructural transition in Gd 5(Si 2Ge 2)

G. D. Samolyuk; V. P. Antropov

doi:10.1063/1.1851693

Exchange coupling in pure hcp Gd and magnetostructural transition in Gd ₅(Si ₂Ge ₂)

G. D. Samolyuk, V. P. Antropov

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Abstract

The electronic structure and magnetic properties of Gd and Gd5 (Si2 Ge2) systems were studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation was implemented and Curie temperature was calculated in pure Gd. The decrease of exchange coupling in Gd5 (Si2 Ge2) through structural transformation leads to first-order magnetostructural phase transition with large value of |∂H∂T| and giant magnetocaloric effect.

Original language	English
Article number	10A310
Journal	Journal of Applied Physics
Volume	97
Issue number	10
DOIs	https://doi.org/10.1063/1.1851693
State	Published - May 15 2005
Externally published	Yes

Funding

We thank M. van Schilfgaarde for useful discussions. This work was carried out at the Ames Laboratory, which is operated for the U.S. Department of Energy by Iowa State University under Contract No. W-7405-82. This work was supported by the Material Sciences Division of the Office of Basic Energy Sciences of the U.S. Department of Energy.

Funders	Funder number
U.S. Department of Energy
Basic Energy Sciences
Iowa State University	W-7405-82

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abstract = "The electronic structure and magnetic properties of Gd and Gd5 (Si2 Ge2) systems were studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation was implemented and Curie temperature was calculated in pure Gd. The decrease of exchange coupling in Gd5 (Si2 Ge2) through structural transformation leads to first-order magnetostructural phase transition with large value of |∂H∂T| and giant magnetocaloric effect.",

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AB - The electronic structure and magnetic properties of Gd and Gd5 (Si2 Ge2) systems were studied using the band structure approach. Multiple-scattering formalism of exchange coupling calculation was implemented and Curie temperature was calculated in pure Gd. The decrease of exchange coupling in Gd5 (Si2 Ge2) through structural transformation leads to first-order magnetostructural phase transition with large value of |∂H∂T| and giant magnetocaloric effect.

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Exchange coupling in pure hcp Gd and magnetostructural transition in Gd ₅(Si ₂Ge ₂)

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