Numerical study of exchange bias in antiferromagnetic/ferromagnetic core/shell nanoparticles with non-magnetic defects

Vatansever Z.

PHYSICS LETTERS A, cilt.382, sa.36, ss.2539-2543, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 382 Sayı: 36
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.physleta.2018.07.001
  • Dergi Adı: PHYSICS LETTERS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2539-2543
  • Anahtar Kelimeler: Core/shell magnetic nanoparticles, Exchange bias, Monte Carlo simulation, RANDOM-FIELD MODEL, MAGNETIC-ANISOTROPY, FEO/FE3O4 NANOPARTICLES, SHELL, MECHANISM
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

We perform Monte Carlo simulations for an antiferromagnetic/ferromagnetic core/shell nanoparticle with a doubly inverted structure. We investigate the dependence of the exchange bias field and coercivity on the magnetic dilution of the shell-interface and shell part. It is demonstrated that exchange bias and coercivity can exhibit monotonic or non-monotonic behavior depending on the location of the nonmagnetic components. Also, temperature dependence of the exchange bias and coercivity of the system are studied for a particular defect concentration value. Our results provide an alternative way for tunning the magnetic properties of doubly inverted nanoparticles. (C) 2018 Elsevier B.V. All rights reserved.