Magnetic properties and exchange bias effect of Y2-x Sr x CoMnO6 (0 ≤ x ≤ 0.5) double perovskites

被引：5
|
作者：
Ma, Chunlin [1 ,2 ]
Wang, Xingyu [1 ]
Cao, Mengxiong [1 ]
Ma, Yaru [1 ]
Tan, Weishi [3 ]
Fang, Yong [4 ]
Zhou, Weiping [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China
[2] Huaiyin Normal Univ, Sch Phys & Elect Elect Engn, Huaian 223001, Peoples R China
[3] Hunan City Univ, Coll Informat & Elect Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang 413002, Peoples R China
[4] Changshu Inst Technol, Dept Phys, Jiangsu Lab Adv Funct Mat, Changshu 215500, Jiangsu, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2018年 / 29卷 / 20期
基金：
中国国家自然科学基金;
关键词：
ROOM-TEMPERATURE; HEUSLER ALLOYS; SPIN-GLASS; MAGNETORESISTANCE; NI;
D O I：
10.1007/s10854-018-9893-3
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The structural and magnetic properties of Y2-x Sr (x) CoMnO6 (0 ae0.5) compounds are investigated in this report. X-ray photoelectron spectroscopy reveals that Co and Mn ions are presented in the form of Co2+/Co3+ and Mn3+/Mn4+, respectively. The broadening of Raman spectra suggests the existence of antisite disorders in these double perovskite oxides. The ferromagnetic transition temperature slightly increases with Sr doping, while the saturated magnetic moment shows a substantial decrease, further confirming the presence of Co/Mn antisite disorders. The signature of exchange bias effect in Y2-x Sr (x) CoMnO6 (0 > 0.5) double perovskites has been observed, which is demonstrated by the displacement of field-cooled magnetic hysteresis loops. Moreover, the exchange bias field is strongly correlated with the degree of antisite disorders and reaches a maximum of 3.4 kOe for x = 0.25. The origin of exchange bias effect can be explained as the interfacial exchange coupling between ferromagnetic regions and antiferromagnetic antiphase boundaries created by antisite disorders in these specimens.
引用
收藏
页码：17818 / 17825
页数：8
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