文章基本信息

标题：Half-Metallic Behavior in Doped Sr2CrOsO6 Double Perovskite with High Transition Temperature
本地全文：下载
作者：Kartik Samanta ; Prabuddha Sanyal ; Tanusri Saha-Dasgupta 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep15010
语种：English
出版社：Springer Nature
摘要：Half-metallic magnets with metallic behavior in one spin channel and insulating in the other, have attracted considerable attention due to their potential application possibility. The spin-dependent nature of the carrier scattering due to half-metallic nature of these materials, allows for the resistance to be strongly influenced by the low magnetic field. However, the operating temperatures of such known materials are generally low, opening up the need for half-metallic magnets with high transition temperatures. The double perovskites having general formula A₂BB′O₆ with alternating ordered arrangement of two transition metal sites, B and B′ offer an attractive possibility in this respect. Here, we consider the case of Sr₂CrOsO₆, which is a ferrimagnetic insulator with transition temperature (T_c) of 725 K, highest ever known in the oxide family, and show that moderate amount of La and Na doping at Sr site can drive the compound half-metallic with high T_c.