Boosting ferromagnetism in freestanding electronically phase separated manganite thin films

被引：1

作者：

Xiang L. ^{[1
]}

Cai P. ^{[2
,3
]}

Li Q. ^{[1
]}

Shi Q. ^{[1
]}

Miao T. ^{[1
]}

Bai Y. ^{[1
]}

Yu Y. ^{[1
]}

Lan F. ^{[1
]}

Guo S. ^{[1
]}

Chen G. ^{[1
]}

Wang W. ^{[1
,6
]}

Yin L. ^{[1
,4
,5
,6
]}

Zhang Y. ^{[1
,4
,5
,6
]}

Shen J. ^{[1
,4
,5
,6
,7
]}

机构：

[1] State Key Laboratory Of Surface Physics, Institute For Nanoelectronic Devices And Quantum Computing, Department Of Physics, Fudan University, Shanghai

[2] Department Of Physics, Beijing Key Laboratory Of Opto-electronic Functional Materials And Micro-nano Devices, Renmin University Of China, Beijing

[3] Key Laboratory Of Quantum State Construction And Manipulation, Ministry Of Education, Renmin University Of China, Beijing

[4] Shanghai Research Center For Quantum Sciences, Shanghai

[5] Collaborative Innovation Center Of Advanced Microstructures, Nanjing

[6] Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai

[7] Shanghai Branch, Cas Center For Excellence And Synergetic, Innovation Center In Quantum Information And Quantum Physics, Shanghai

来源：

Physical Review Materials | 2024年 / 8卷 / 05期

基金：

上海市自然科学基金; 中国国家自然科学基金;

关键词：

Compendex;

D O I：

10.1103/PhysRevMaterials.8.054417

中图分类号：

学科分类号：

摘要：

The physical properties of manganites depend sensitively on their lattice degree of freedom. While lattice parameter can be controlled by growing epitaxial thin films on substrates with different lattice constants or application of high pressure, the range of lattice variation is limited to 2-3% before dislocations start to emerge. In contrast, fabrication of freestanding thin films allows one to change the uniaxial lattice parameter up to 8.2%, which opens up a new platform to investigate emergent phenomena under large lattice-constant change. In this work, we fabricate freestanding (La2/3Pr1/3)5/8Ca3/8MnO3 (LPCMO) thin films and investigate how the physical properties are affected by the absence of substrate. We find large length-scale electronic phase separation is greatly suppressed in the freestanding film after being released from the tensile strain of the SrTiO3 substrate. Consequently, the ferromagnetism is boosted in the freestanding film. The physical properties of the freestanding LPCMO thin film are observed to be comparable to those of LPCMO thin film epitaxially grown on nearly strain-free substrate, revealing that freestanding thin film retains the intrinsic physical properties of LPCMO system, which provides a reliable platform to study effects of large strain and strain gradient (by curvature) in manganite systems. © 2024 authors. Published by the American Physical Society.

引用

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