Thickness-driven first-order phase transitions in manganite ultrathin films

doi:10.1103/PhysRevB.99.214419

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Thickness-driven first-order phase transitions in manganite ultrathin films
	Chen, HY ; Yu, Y ; Wang, Z ; Bai, Y ; Lin, HX ; Li, XL ; Liu, H ; Miao, T ; Kou, YF ; Zhang, YS
刊名	PHYSICAL REVIEW B
	2019
卷号	99 期号:21 页码:—
关键词	TOTAL-ENERGY CALCULATIONS GIANT MAGNETORESISTANCE
ISSN号	2469-9950
DOI	10.1103/PhysRevB.99.214419
文献子类	期刊论文
英文摘要	We report thickness dependent inhomogeneous antiferromagnetic (AFM) to ferromagnetic (FM) phase transitions in ultrathin La0.7Sr0.3MnO3 (LSMO) films grown on the SrTiO3 substrate. When the films are 4-7 unit cells (UCs) thick, FM domains appear as isolated nanodisks in the AFM matrix that together floats on top of the three AFM base UCs, leading a superparamagnetic blocking behavior. Our first principles calculations unravel the rather counterintuitive physical origin of this mixed phase state; the formation of FM/AFM domain boundaries is energetically favorable. At 8 UCs, an abrupt shear strain relief occurs in the LSMO thin film and twinning patterns with two unit cell periodicity form along the [010] and [100] directions. Our studies reveal the complexity of the magnetic phase transition at the nanometer scale and open a door for the development of quantum devices and statistical theories.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31876]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China; 2.Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China; 3.Fudan Univ, Inst Nanoelect Devices & Quantum Comp, Shanghai 200433, Peoples R China; 4.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China; 5.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China; 6.Tsinghua Univ, Natl Ctr Electron Microscopy Beijing, Sch Mat Sci & Engn, Key Lab Adv Mat MOE,State Key Lab New Ceram & Fin, Beijing 100084, Peoples R China; 7.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Chen, HY,Yu, Y,Wang, Z,et al. Thickness-driven first-order phase transitions in manganite ultrathin films[J]. PHYSICAL REVIEW B,2019,99(21):—.
APA	Chen, HY.,Yu, Y.,Wang, Z.,Bai, Y.,Lin, HX.,...&Shen, J.(2019).Thickness-driven first-order phase transitions in manganite ultrathin films.PHYSICAL REVIEW B,99(21),—.
MLA	Chen, HY,et al."Thickness-driven first-order phase transitions in manganite ultrathin films".PHYSICAL REVIEW B 99.21(2019):—.