Ferromagnetic metallic Sr-rich Ln1/2A1/2CoO3 cobaltites with spontaneous spin rotation

Jessica Padilla-Pantoja, Arnau Romaguera, Xiaodong Zhang, Javier Herrero-Martín, Francois Fauth, Javier Blasco, and José Luis García-Muñoz
Phys. Rev. B 104, 054411 – Published 9 August 2021

Abstract

The Pr0.50Sr0.50CoO3 perovskite exhibits unique magnetostructural properties among the rest of ferromagnetic (FM)/metallic Ln0.50Sr0.50CoO3 compounds. The sudden orthorhombic-tetragonal (ImmaI4/mcm) structural transition produces an unusual magnetic behavior vs temperature and external magnetic fields. The symmetry change is responsible for a spontaneous spin rotation in this metallic oxide. We have studied half-doped Ln0.50(Sr1xAx)0.50CoO3 cobaltites varying the ionic radius rA of A-site cations (divalent cations and lanthanides) to complete the T-rA phase diagram. The influence of the structural distortion and the A-cation size for the occurrence of a spontaneous spin reorientation in the metallic state has been investigated. As the magnetization reorientation is driven by the temperature-induced collapse of the orthorhombic distortion, a careful investigation of the structural symmetry is presented, varying the structural distortion of the Sr-rich half-doped cobaltites by means of both compositional and temperature changes. The region in the phase diagram of these FM/metallic cobaltites where Fmmm magnetic symmetry replaces Imma was determined. In that region, the magnetization direction has rotated 45 ° within the ab plane from the former to the latter.

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  • Received 9 March 2021
  • Revised 14 July 2021
  • Accepted 14 July 2021

DOI:https://doi.org/10.1103/PhysRevB.104.054411

©2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Jessica Padilla-Pantoja1, Arnau Romaguera1, Xiaodong Zhang1, Javier Herrero-Martín2, Francois Fauth2, Javier Blasco3, and José Luis García-Muñoz1,*

  • 1Institut de Ciència de Materials de Barcelona, ICMAB-CSIC, Campus UAB, 08193 Bellaterra, Spain
  • 2CELLS-ALBA Synchrotron, 08290 Cerdanyola del Vallès, Catalunya, Spain
  • 3Instituto de Nanociencia y Materiales de Aragón, Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009 Zaragoza, Spain

  • *Corresponding author: garcia.munoz@icmab.es

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Issue

Vol. 104, Iss. 5 — 1 August 2021

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