Electronic correlation effects on the Curie temperature in double perovskites

被引：1

作者：

Navarro, O. ^{[1
]}

Estrada, F. ^{[2
]}

Guzman, E. J. ^{[1
,3
]}

Avignon, M. ^{[4
,5
]}

机构：

[1] Univ Nacl Autonoma Mexico, Unidad Morelia Inst Invest Mat, Antigua Carretera Patzcuaro 8701, Morelia 58190, Michoacan, Mexico

[2] Univ Michoacana, Fac Biol, Ave Francisco J Mujica S-N Ciudad Univ, Morelia, Michoacan, Mexico

[3] Univ Michoacana, Fac Ciencias Fis Matemat, Ave Francisco J Mujica S-N Ciudad Univ, Morelia, Michoacan, Mexico

[4] CNRS, Inst Neel, BP 166, F-38042 Grenoble, France

[5] Univ Joseph Fourier, BP 166, F-38042 Grenoble, France

来源：

MATERIALS TODAY-PROCEEDINGS | 2018年 / 5卷 / 09期

关键词：

Half-metallic; Electronic correlation; Spintronics; MAGNETIC-PROPERTIES;

D O I：

10.1016/j.matpr.2018.06.045

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to understand the role of electronic parameters controlling the half-metallic ground state and high Curie temperature in double perovskites we study the ferromagnetic compound Sr2FeMO6, where M is a transition metal. Here, we present a theoretical electronic approach to study the thermodynamic properties of these perovskites using the Green function technique and the renormalization perturbation expansion method. Our approach is based on an interacting picture of localized Fe-electrons and conduction M-electrons via a double-exchange-type mechanism and taking into account electronic correlation. Our results show an increase of the Curie temperature together with a shift to high band filling in good agreement with experimental results. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：17431 / 17436

页数：6

共 7 条

[1] Mean-field theory for double perovskites:: Coupling between itinerant electron spins and localized spins [J].