Exchange bias mechanism in FM/FM/AF spin valve systems in the presence of random unidirectional anisotropy field at the AF interface: The role played by the interface roughness due to randomness

YÜKSEL Y.

PHYSICS LETTERS A, cilt.382, sa.19, ss.1298-1304, 2018 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 382 Sayı: 19
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1016/j.physleta.2018.03.009
  • Dergi Adı: PHYSICS LETTERS A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1298-1304
  • Anahtar Kelimeler: Atomistic modeling, Exchange bias, Magnetic multilayers, Monte Carlo, Spin valve, MODEL, SIMULATION, STATE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

We propose an atomistic model and present Monte Carlo simulation results regarding the influence of FM/AF interface structure on the hysteresis mechanism and exchange bias behavior for a spin valve type FM/FM/AF magnetic junction. We simulate perfectly flat and roughened interface structures both with uncompensated interfacial AF moments. In order to simulate rough interface effect, we introduce the concept of random exchange anisotropy field induced at the interface, and acting on the interface AF spins. Our results yield that different types of the random field distributions of anisotropy field may lead to different behavior of exchange bias. (C) 2018 Elsevier B.V. All rights reserved.