Strained single crystal high entropy oxide manganite thin films

被引：1

作者：

Zhao, Zhibo ^{[1
,2
]}

Waqar, Moaz ^{[3
]}

Jaiswal, Arun Kumar ^{[4
]}

Raghavan, Aaditya Rangan ^{[5
]}

Fuchs, Dirk ^{[4
]}

Lin, Jing ^{[1
]}

Brezesinski, Torsten ^{[1
]}

Bhattacharya, Subramshu S. ^{[5
]}

Hahn, Horst ^{[1
,2
,6
]}

Pan, Xiaoqing ^{[3
,7
,8
]}

Kruk, Robert ^{[1
]}

Sarkar, Abhishek ^{[1
,2
,9
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nanotechnol, Kaiserstr 12, D-76131 Karlsruhe, Germany

[2] Tech Univ Darmstadt, KIT TUD Joint Res Lab Nanomat, D-64287 Darmstadt, Germany

[3] Univ Calif Irvine, Dept Mat Sci & Engn, Irvine, CA 92697 USA

[4] Karlsruhe Inst Technol, Inst Quantum Mat & Technol, Kaiserstr 12, D-76131 Karlsruhe, Germany

[5] Indian Inst Technol Madras, Nanofunct Mat Technol Ctr NFMTC, Dept Met & Mat Engn, Chennai 600036, India

[6] Univ Oklahoma, Sch Sustainable Chem Biol & Mat Engn, Norman, OK USA

[7] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[8] Univ Calif Irvine, Irvine Mat Res Inst, Irvine, CA 92717 USA

[9] Indian Inst Technol Delhi, Dept Mat Sci & Engn, Hauz Khas 110016, New Delhi, India

来源：

APPLIED PHYSICS LETTERS | 2024年 / 125卷 / 01期

基金：

欧盟地平线“2020”; 美国国家科学基金会;

关键词：

Entropy - Epitaxial growth - Gadolinium compounds - Gallium compounds - Lanthanum compounds - Lattice mismatch - Magnesia - Manganese oxide - Manganites - Neodymium compounds - Oxide films - Perovskite solar cells - Samarium compounds - Single crystals - Strontium titanates - Thin films;

D O I：

10.1063/5.0206767

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ability to accommodate multiple principal cations within a single crystallographic structure makes high entropy oxides (HEOs) ideal systems for exploring new composition-property relationships. In this work, the high-entropy design strategy is extended to strained single-crystal HEO-manganite (HEO-Mn) thin films. Phase-pure orthorhombic films of (Gd0.2La0.2Nd0.2Sm0.2Sr0.2)MnO3 were deposited on three different single-crystal substrates: SrTiO3 (STO) (100), NdGaO3 (110), and LaAlO3 (LAO) (100), each inducing different degrees of epitaxial strain. Fully coherent growth of the thin films is observed in all cases, despite the high degree of lattice mismatch between HEO-Mn and LAO. Magnetometry measurements reveal distinct differences in the magnetic properties between epitaxially strained HEO-Mn thin films and their bulk crystalline HEO counterparts. In particular, the bulk polycrystalline HEO-Mn shows two magnetic transitions as opposed to a single one observed in epitaxial thin films. Moreover, the HEO-Mn film deposited on LAO exhibits a significant reduction in the Curie temperature, which is attributed to the strong variation of the in-plane lattice parameter along the thickness of the film and the resulting changes in the Mn-O-Mn bond geometry. Thus, this preliminary study demonstrates the potential of combining high entropy design with strain engineering to tailor the structure and functionality of perovskite manganites. (c) 2024 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International (CC BY-NC-ND) license

引用

页数：6