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Title: Magnetic Anisotropy of a Quasi Two-Dimensional Canted Antiferromagnet
Authors: Lim, Zhi Shiuh 
Li, Changjian 
Chi, Xiao 
Omar, Ganesh Ji
Ma, Haijiao Harsan 
Huang, Zhen 
Zeng, Shengwei 
Yang, Ping 
Venkatesan, Thirumalai 
Rusydi, Andrivo 
Pennycook, Stephen John 
Ariando, Ariando 
Keywords: 2D-antiferromagnet
Anisotropic magnetoresistance
Magnetic phase transition
Magnetoelastic coupling
Pseudospin quadrupoles
Issue Date: 31-Jan-2020
Publisher: American Chemical Society
Citation: Lim, Zhi Shiuh, Li, Changjian, Chi, Xiao, Omar, Ganesh Ji, Ma, Haijiao Harsan, Huang, Zhen, Zeng, Shengwei, Yang, Ping, Venkatesan, Thirumalai, Rusydi, Andrivo, Pennycook, Stephen John, Ariando, Ariando (2020-01-31). Magnetic Anisotropy of a Quasi Two-Dimensional Canted Antiferromagnet. NANO LETTERS 20 (3) : 1890 - 1895. ScholarBank@NUS Repository.
Abstract: We report the control of the interplane magnetic exchange coupling in CaIrO3 perovskite thin films and superlattices with SrTiO3. By analyzing the anisotropic magneto-transport data, we demonstrate that a semimetallic paramagnetic CaIrO3 turns into a canted antiferromagnetic Mott insulator at reduced dimensions. The emergence of a biaxial magneto-crystalline anisotropy indicates the canted moment responding to the cubic symmetry. Extending to superlattices and probing oxygen octahedral rotation by half-integer X-ray Braggs diffraction, a more complete picture about the canted moment evolution with interplane coupling can be understood. Remarkably, a rotation of the canted moments' easy axes by 45ø is also observed by a sign reversal of the in-plane strain. These results demonstrate the robustness of anisotropic magnetoresistance in revealing quasi two-dimensional canted antiferromagnets, as well as valuable insights about quadrupolar magnetoelastic coupling, relevant for designing future antiferromagnetic spintronic devices. Copyright © 2020 American Chemical Society.
Source Title: NANO LETTERS
ISSN: 15306984
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