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Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films
Ye, JX; Sun, XK; Wu ZH(吴忠华); Wu, ZH; Liu, JW; An, YK
2018
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
EISSN1873-4669
Volume768Pages:750-755
SubtypeArticle
AbstractLocal Co structures and magnetic properties of the Co-doped LiNbO3 films deposited by RF-magnetron sputtering have been systemically studied by different experimental techniques. The detailed structural analysis using XRD, XPS, XANES and EXAFS as well as full multiple-scattering ab initio theoretical calculations of Co K-edge XANES spectra show that the doped Co ions substitute for the Li sites of the LiNbO3 lattice with +2 oxidation state and form CoLi + V-O complexes with oxygen vacancies in the nearest coordination shell of Co. No extra impurity peaks, such as Co metal clusters and Co oxide secondary phases were observed with the XRD detection limit. All the Co-doped LiNbO3 films display obvious room temperature (RT) ferromagnetism with a Curie temperature of about 630 K. The saturation magnetic moments (M-s) decreases monotonously with increasing Co concentration, which is attributed to an increase in the antiferromagnetic coupling between Co ions. It can concluded that the observed RT ferromagnetism is intrinsic and originates from electrons bound in defect states associated with oxygen vacancies, producing an effective ferromagnetic interaction and aligning the magnetic moments of BMPs. This work provides strong evidence that the ferromagnetism and ferroelectricity can coexist in the Codoped LiNbO3 systems. (c) 2018 Elsevier B.V. All rights reserved.
KeywordLiNbO3 films Co-doping Local structure Vacancy Ferromagnetism
DOI10.1016/j.jallcom.2018.07.302
WOS KeywordMAGNETIC-PROPERTIES ; BIFEO3
Indexed BySCI ; EI
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000446320700087
EI Accession Number20183105646711
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286395
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Ye, JX,Sun, XK,Wu ZH,et al. Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,768:750-755.
APA Ye, JX,Sun, XK,吴忠华,Wu, ZH,Liu, JW,&An, YK.(2018).Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films.JOURNAL OF ALLOYS AND COMPOUNDS,768,750-755.
MLA Ye, JX,et al."Evidence of the oxygen vacancies-induced room temperature ferromagnetism in multiferroic Co-doped LiNbO3 films".JOURNAL OF ALLOYS AND COMPOUNDS 768(2018):750-755.
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