Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session A23: Bulk Manganites and Cobaltites
8:00 AM–11:00 AM,
Monday, March 5, 2018
LACC Room: 402B
Sponsoring Units: GMAG DMP DCOMP
Chair: Xianglin Ke, Michigan State University
Abstract: A23.00012 : Pressure-Induced Magnetic and Electronic Transition in SrCoO3 Perovskite*
10:36 AM–10:48 AM
(National Central University)
Perovskite cobaltites (La,Sr)CoO3 have been intensively studied for their complicated magnetic properties, which arise from the multiple oxidation and spin states of cobalt. Even the end members, LaCoO3 and SrCoO3, exhibit great complexity. For example, both temperature and strain can induce spin transition in LaCoO3, and the spin state of magnetic Co3+ has been a matter of debate. Recently, SrCoO3 has attracted considerable attention. At ambient pressure, SrCoO3 is a ferromagnetic metal (Tc ~ 305 K) crystalizing in cubic perovskite (Pm-3m symmetry) with lattice parameter a ~ 3.829 Å . The magnetic Co4+ in SrCoO3 has been suggested to be in the intermediate-spin (IS) state (S = 3/2). Also, experiments have shown that SrCoO3 remains in Pm-3m symmetry under compression up to 60 GPa . Using first-principles calculations, we investigate the magnetic and electronic states of cubic perovskite SrCoO3 . Our calculations indicate that SrCoO3 undergoes a magnetic and electronic transition induced by pressure.
 Y. Long et al., J. Phys.: Condens. Matter 23, 245601 (2011).
 J.-Y. Yang et al., Phys. Rev. B 92, 195147 (2015).
*This work is supported by the Ministrty of Science and Technology of Taiwan under Grants No. MOST 104-2112-M-008-005-MY3 and 106-2119-M-001-028.
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