Exotic Magnetism in Perovskite KOsO3

A new perovskite KOsO3 has been stabilized under high-pressure and high-temperature conditions. It is cubic at 500 K (Pm-3m) and undergoes subsequent phase transitions to tetragonal at 320 K (P4/mmm) and rhombohedral (R-3m) at 230 K as shown from refining synchrotron x-ray powder diffraction (SXRD)...

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Detalles Bibliográficos
Autores: Chen, J., Li, H., Gainza, Javier, Muñoz, A., Alonso, J.A., Liu, J., Chen, Y.-S., Belik, A.A., Yamaura, K., He, J., Li, X., Goodenough, J.B., Zhou, J.-S.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/393460
Acceso en línea:http://hdl.handle.net/10261/393460
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85190065479&doi=10.1103%2fPhysRevLett.132.156701&partnerID=40&md5=f130172fdc55aea28ee531a658a4be91
Access Level:acceso abierto
Palabra clave:Magnetic interactions
Magnetic order
Antiferromagnets
Density functional theory
First-principles calculations
Neutron diffraction
Sintering
Descripción
Sumario:A new perovskite KOsO3 has been stabilized under high-pressure and high-temperature conditions. It is cubic at 500 K (Pm-3m) and undergoes subsequent phase transitions to tetragonal at 320 K (P4/mmm) and rhombohedral (R-3m) at 230 K as shown from refining synchrotron x-ray powder diffraction (SXRD) data. The larger orbital overlap integral and the extended wave function of 5d electrons in the perovskite KOsO3 allow to explore physics from the regime where Mott and Hund's rule couplings dominate to the state where the multiple interactions are on equal footing. We demonstrate an exotic magnetic ordering phase found by neutron powder diffraction along with physical properties via a suite of measurements including magnetic and transport properties, differential scanning calorimetry, and specific heat, which provide comprehensive information for a system at the crossover from localized to itinerant electronic behavior. © 2024 American Physical Society.

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