Effect of A-Site Cation Ordering on the Electrical and Magnetic Properties of Manganite Films

被引：2
|
作者：
Wang, Zhenzhen [1 ,2 ]
An, Qichang [1 ,2 ]
Meng, Meng [1 ]
Xue, Wenhua [1 ,2 ]
Bi, Jiachang [3 ]
Cao, Yanwei [3 ]
Wang, Yumei [1 ]
Liu, Xiaoran [1 ]
Yang, Fang [1 ]
Guo, Jiandong [1 ,2 ,4 ]
机构：
[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[4] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2022年 / 259卷 / 07期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
A-site cation ordering; electronic phase separation; oxygen vacancies; post-annealing; superlattices; TRANSITION; OXYGEN; LA2/3SR1/3MNO3; DISORDER; PHYSICS; STATE;
D O I：
10.1002/pssb.202100564
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
(111)-oriented [(SrMnO3)(1)/(LaMnO3)(2)](n) superlattices with artificial A-site cation ordering with respect to the compositionally equivalent La2/3Sr1/3MnO3 films with a random distribution of the A-site dopants are fabricated. It is found that the ferromagnetism and electrical transport properties of La2/3Sr1/3MnO3 films are primarily independent of the degree of A-site cation ordering, as evidenced by their identical critical temperatures of phase transition. These results may reveal the spontaneous nature of the electronic phase separation, which is key to the colossal magnetoresistance effect in manganites. In contrast, compared to the La2/3Sr1/3MnO3 films, the A-site ordered (111) superlattices have a tendency to preserve oxygen vacancies inside, making them extremely difficult to be compensated by the post-annealing process.
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页数：6
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