Tuning the Spontaneous Exchange Bias Effect in La1.5Sr0.5CoMnO6 with Sintering Temperature: Article No. 044408

C. Macchiutti, J. Jesus, F. Carneiro, L. Bufaical, R. Klein, Q. Zhang, M. Kirkham, C. Brown, R. dos Reis, G. Perez, E. Bittar

Research output: Contribution to journalArticlepeer-review

Abstract

Here, we present a study of the influence of microstructure on the magnetic properties of polycrystalline samples of the La1.5Sr0.5CoMnO6 double perovskite, with primary attention to the spontaneous exchange bias effect, a fascinating recently discovered phenomena for which some materials exhibit unidirectional magnetic anisotropy after being cooled in zero magnetic fields. By sintering La1.5Sr0.5CoMnO6 at different temperatures, we obtained samples with distinct average grain sizes, ranging from 1.54-6.65 ..mu..m. A detailed investigation of the material's structural, morphologic, electronic, and magnetic properties using x-ray powder diffraction, powder neutron diffraction, x-ray absorption near edge structure spectroscopy, scanning electron microscopy, and ac and dc magnetometry has revealed a systematic enhancement of the exchange bias effect with increasing the average grain size. This evolution is discussed in terms of changes in the material's porosity and grain morphology and its influence on the exchange couplings at the magnetic interfaces.
Original languageAmerican English
Number of pages10
JournalPhysical Review Materials
Volume8
Issue number4
DOIs
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5900-88022

Keywords

  • exchange bias
  • magnetism
  • magnetization measurements
  • perovskites
  • spin glasses

Fingerprint

Dive into the research topics of 'Tuning the Spontaneous Exchange Bias Effect in La1.5Sr0.5CoMnO6 with Sintering Temperature: Article No. 044408'. Together they form a unique fingerprint.

Cite this