Nanoscale ferroelastic twins formed in strained LaCoO3 films

被引：59

作者：

Guo, Er-Jia ^{[1
,2
,3
,4
]}

Desautels, Ryan ^{[1
]}

Keavney, David ^{[5
]}

Roldan, Manuel A. ^{[6
]}

Kirby, Brian J. ^{[7
]}

Lee, Dongkyu ^{[1
]}

Liao, Zhaoliang ^{[1
]}

Charlton, Timothy ^{[1
]}

Herklotz, Andreas ^{[1
,8
]}

Ward, T. Zac ^{[1
]}

Fitzsimmons, Michael R. ^{[1
,9
]}

Lee, Ho Nyung ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[3] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[4] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[5] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[6] Arizona State Univ, Eyring Mat Ctr, Tempe, AZ 85287 USA

[7] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[8] Martin Luther Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Saale, Germany

[9] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

来源：

SCIENCE ADVANCES | 2019年 / 5卷 / 03期

关键词：

DOMAIN-STRUCTURE; REFLECTOMETRY; GROWTH; WALLS;

D O I：

10.1126/sciadv.aav5050

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The coexistence and coupling of ferroelasticity and magnetic ordering in a single material offers a great opportunity to realize novel devices with multiple tuning knobs. Complex oxides are a particularly promising class of materials to find multiferroic interactions due to their rich phase diagrams, and are sensitive to external perturbations. Still, there are very few examples of these systems. Here, we report the observation of twin domains in ferroelastic LaCoO3 epitaxial films and their geometric control of structural symmetry intimately linked to the material's electronic and magnetic states. A unidirectional structural modulation is achieved by selective choice of substrates having twofold rotational symmetry. This modulation perturbs the crystal field-splitting energy, leading to unexpected in-plane anisotropy of orbital configuration and magnetization. These findings demonstrate the use of structural modulation to control multiferroic interactions and may enable a great potential for stimulation of exotic phenomena through artificial domain engineering.

引用

页数：7