Effect of temperature on the magnetic properties of Fe(3)O(4) thin films studied by ferromagnetic resonance (FMR)


Budak S., Yildiz F., Ozdemir M., Aktas B.

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, cilt.245, sa.8, ss.1647-1652, 2008 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 245 Konu: 8
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1002/pssb.200743177
  • Dergi Adı: PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
  • Sayfa Sayıları: ss.1647-1652

Özet

Single crystalline Fe(3)O(4) thin films of 110 angstrom thickness grown on MgO (100) substrate have been investigated by Ferromagnetic Resonance (FMR) technique as a function of temperature between 3 and 300 K. A strong unidirectional (exchange) anisotropy field was detected as evidence from a shift of the resonance field for the r-FC case relative to that for n-FC case at lower temperature. Using a field-induced unidirectional exchange and bulk anisotropy, with the usual magneto-crystalline cubic anisotropy energy, we have simulated both the experimental spectra and angular dependence of resonance field to deduce anisotropy and other magnetic parameters as a function of temperature. Magnetic parameters and Verwey transition for the thin film case were found to shift down to around 90 K from 120 K for bulk sample of the same compound as well. (c) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.