Exchange Interactions and Curie Temperature of Ce-Substituted SmCo5
Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
Condensed Matter Theory Group, Paul Scherrer Institute (PSI), CH-5232 Villigen, Switzerland
Received: 13 December 2018 / Revised: 7 January 2019 / Accepted: 8 January 2019 / Published: 14 January 2019
A partial substitution such as Ce in SmCo
could be a brilliant way to improve the magnetic performance, because it will introduce strain in the structure and breaks the lattice symmetry in a way that enhances the contribution of the Co atoms to magnetocrystalline anisotropy. However, Ce substitutions, which are benefit to improve the magnetocrystalline anisotropy, are detrimental to enhance the Curie temperature (
). With the requirements of wide operating temperature range of magnetic devices, it is important to quantitatively explore the relationship between the
and ferromagnetic exchange energy. In this paper we show, based on mean-field approximation, artificial tensile strain in SmCo
induced by substitution leads to enhanced effective ferromagnetic exchange energy and
, even though Ce atom itself reduces
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Jekal, S. Exchange Interactions and Curie Temperature of Ce-Substituted SmCo5. Condens. Matter 2019, 4, 11.
Jekal S. Exchange Interactions and Curie Temperature of Ce-Substituted SmCo5. Condensed Matter. 2019; 4(1):11.
Jekal, Soyoung. 2019. "Exchange Interactions and Curie Temperature of Ce-Substituted SmCo5." Condens. Matter 4, no. 1: 11.
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