IMR OpenIR
Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO3-delta films
Wang, F; Zhang, YQ; Bai, Y; Liu, W; Zhang, HR; Wang, WY; Li, SK; Ma, S; Zhao, XG; Sun, JR; Wang, ZH; Wang, ZJ; Zhang, ZD; Liu, W (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
2016-08-01
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume109Issue:5
AbstractThe crystal structures and magnetic properties of the 40 nm brownmillerite SrMnO2.5 film, perovskite SrMnO3-delta film, and mixed-phase film have been systematically investigated. The features of the oxygen vacancy ordering superstructure in the brownmillerite SrMnO2.5 film are observed from HRSTEM as follows: the dark stripes with a periodicity of four (110) planes of the cubic perovskite appearing at an angle of 45 degrees with the substrate-film interface and extra reflection spots in fast Fourier transformation patterns along the (001) plane. When annealing the brownmillerite SrMnO2.5 film under higher oxygen pressure, the top portion undergoes structure transition into perovskite SrMnO3-delta as seen in the mixed-phase film consisting of the perovskite SrMnO3-delta phase dominating at the top part and the brownmillerite SrMnO2.5 phase dominating at the bottom part. The magnetic properties and Mn valences of the brownmillerite SrMnO2.5 film indicate that this film, similar to the bulk, is antiferromagnetic with TN at 375 K. However, the strained tetragonal perovskite SrMnO3-delta film exhibits ferromagnetic behavior with Curie temperature at 75K and a saturation magnetization of 2.5 mu(B)/Mn at 2 K. Moreover, the top perovskite SrMnO3-delta phase of the mixed-phase film also exhibits ferromagnetic behavior evidenced by the existence of the exchange bias. We propose that the ferromagnetic properties in both the perovskite SrMnO3-delta film and the top perovskite SrMnO3-delta phase in the mixed-phase film originate from Mn3+-Mn4+ double exchange coupling. However, the formation of Mn3+ differs for the two samples in that it is caused by oxygen vacancies in the former and the distribution of oxygen content across the film during annealing in the latter. Published by AIP Publishing.
description.department[wang, f. ; zhang, y. q. ; bai, y. ; liu, w. ; wang, w. y. ; li, s. k. ; ma, s. ; zhao, x. g. ; wang, z. h. ; wang, z. j. ; zhang, z. d.] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [zhang, h. r. ; sun, j. r.] chinese acad sci, beijing natl lab condensed matter, inst phys, beijing 100190, peoples r china
Subject AreaPhysics, Applied
Funding OrganizationNational Nature Science Foundation of China [51331006, 51590883, 51271177, 11520101002]; Chinese Academy of Sciences [KJZD-EW-M05-3]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76315
Collection中国科学院金属研究所
Corresponding AuthorLiu, W (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Wang, F,Zhang, YQ,Bai, Y,et al. Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO3-delta films[J]. APPLIED PHYSICS LETTERS,2016,109(5).
APA Wang, F.,Zhang, YQ.,Bai, Y.,Liu, W.,Zhang, HR.,...&Liu, W .(2016).Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO3-delta films.APPLIED PHYSICS LETTERS,109(5).
MLA Wang, F,et al."Oxygen vacancy formation, crystal structures, and magnetic properties of three SrMnO3-delta films".APPLIED PHYSICS LETTERS 109.5(2016).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, F]'s Articles
[Zhang, YQ]'s Articles
[Bai, Y]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, F]'s Articles
[Zhang, YQ]'s Articles
[Bai, Y]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, F]'s Articles
[Zhang, YQ]'s Articles
[Bai, Y]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.