Critical Behavior of the (111)-Oriented LaCoO3/SrTiO3 Thin Film

doi:10.1002/pssb.202100424

	Critical Behavior of the (111)-Oriented LaCoO3/SrTiO3 Thin Film
	Liu, Hao 2,3; Fan, Jiyu 2,3; Zhao, Jun 4; Qian, Fengjiao 2,3; Zhu, Yan 2,3; Ma, Chunlan 5; Rahman, Azizur 1; Zhang, Lei 4; Yang, Hao 2,3
刊名	PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
	2021-11-19
关键词	critical exponents LaCoO3 thin films phase transitions strain
ISSN号	0370-1972
DOI	10.1002/pssb.202100424
通讯作者	Fan, Jiyu(jiyufan@nuaa.edu.cn) ; Yang, Hao(yanghao@nuaa.edu.cn)
英文摘要	Apart from the impact of different substrates on epitaxial thin films due to lattice constant mismatches, the properties of epitaxial thin films are also influenced by the same substrates with different crystal orientations. Herein, the (111)-oriented SrTiO3 (STO) substrates are used to fabricate the LaCoO3 (LCO) epitaxial thin films rather than the more common (001)-oriented STO substrates. It undergoes one paramagnetic-ferromagnetic phase transition around 50 K. This phase transition is similar to the previously observed for (001)-LCO/STO, but the Curie temperature (T (c)) is significantly lower than the previously reported 80 K. To investigate the decrease of T (c) and gain further insight into the phase transition, the critical behavior analysis of thin film is performed. The critical exponents are determined to be beta = 1.591(3) and gamma = 0.937(1) by reconstructing a modified Arrott plot, and the reliability of these exponents is confirmed by the Widom scaling relation. Using the renormalization group theory approach, it is discovered that the film has a long-range magnetic interaction with space dimensionality d = 2 and spin dimensionality n = 1, and the magnetic exchange interaction decays J ( r ) approximate to r - 2.4473 .
资助项目	National Natural Science Foundation of China[11974181] ; National Natural Science Foundation of China[11774172] ; Postgraduate Research & Practice Innovation Program of Jiangsu Province[KYCX21_0177] ; Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
WOS关键词	EQUATION-OF-STATE ; SPIN-STATE ; FERROMAGNETISM
WOS研究方向	Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000720270400001
资助机构	National Natural Science Foundation of China ; Postgraduate Research & Practice Innovation Program of Jiangsu Province ; Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126592]
专题	中国科学院合肥物质科学研究院
通讯作者	Fan, Jiyu; Yang, Hao
作者单位	1.Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China 2.Nanjing Univ Aeronaut & Astronaut, Dept Appl Phys, Nanjing 211106, Peoples R China 3.MIIT, Key Lab Aerosp Informat Mat & Phys NUAA, Nanjing 211106, Peoples R China 4.Chinese Acad Sci, High Magnet Field Lab, Hefei 230031, Peoples R China 5.Suzhou Univ Sci & Technol, Sch Phys Sci & Technol, Jiangsu Key Lab Micro & Nano Heat Fluid Flow Tech, Suzhou 215009, Peoples R China
推荐引用方式 GB/T 7714	Liu, Hao,Fan, Jiyu,Zhao, Jun,et al. Critical Behavior of the (111)-Oriented LaCoO3/SrTiO3 Thin Film[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS,2021.
APA	Liu, Hao.,Fan, Jiyu.,Zhao, Jun.,Qian, Fengjiao.,Zhu, Yan.,...&Yang, Hao.(2021).Critical Behavior of the (111)-Oriented LaCoO3/SrTiO3 Thin Film.PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS.
MLA	Liu, Hao,et al."Critical Behavior of the (111)-Oriented LaCoO3/SrTiO3 Thin Film".PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS (2021).