A spin-wave resonance study on reentrant Ni77Mn23 thin films

M. Özdemir, B. Aktaş, Y. Öner, Tetsuya Sato, T. Ando

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The magnetic properties of thin (300 Å) reentrant Ni77Mn23 films grown on a quartz substrate using the electron beam evaporation technique have been investigated. The spin-wave resonance (SWR) technique has been used to study the exchange parameter D and magnetic anisotropies as a function of temperature between 4 and 300 K. The SWR spectra exhibit directional character upon cooling the sample in an external field Hc, which is a sign of a spin-glass property. At higher temperatures, in addition to the dominant surface SWR mode, there is a much weaker bulk mode on the lower field side. Using a uniaxial surface and effective bulk anisotropy together we simulated the experimental spectra and deduced the surface anisotropy and magnetic stiffness parameters as a function of temperature. The sample shows an easy plane surface anisotropy. Both the exchange and anisotropy parameters increase when the temperature is in the spin-glass regime. Furthermore, the surface anisotropy energy dominates the overall magnetic behavior of this system.

Original languageEnglish
Pages (from-to)53-60
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume164
Issue number1-2
Publication statusPublished - 1996 Nov

Fingerprint

Spin waves
magnons
Anisotropy
Thin films
anisotropy
thin films
Spin glass
spin glass
Temperature
Quartz
Magnetic anisotropy
Surface waves
Electron beams
Magnetic properties
Evaporation
temperature
Stiffness
stiffness
Cooling
quartz

Keywords

  • Ferromagnetism
  • Reentrant
  • Spin-wave resonance
  • Surface anisotropy
  • Thin films

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Özdemir, M., Aktaş, B., Öner, Y., Sato, T., & Ando, T. (1996). A spin-wave resonance study on reentrant Ni77Mn23 thin films. Journal of Magnetism and Magnetic Materials, 164(1-2), 53-60.

A spin-wave resonance study on reentrant Ni77Mn23 thin films. / Özdemir, M.; Aktaş, B.; Öner, Y.; Sato, Tetsuya; Ando, T.

In: Journal of Magnetism and Magnetic Materials, Vol. 164, No. 1-2, 11.1996, p. 53-60.

Research output: Contribution to journalArticle

Özdemir, M, Aktaş, B, Öner, Y, Sato, T & Ando, T 1996, 'A spin-wave resonance study on reentrant Ni77Mn23 thin films', Journal of Magnetism and Magnetic Materials, vol. 164, no. 1-2, pp. 53-60.
Özdemir, M. ; Aktaş, B. ; Öner, Y. ; Sato, Tetsuya ; Ando, T. / A spin-wave resonance study on reentrant Ni77Mn23 thin films. In: Journal of Magnetism and Magnetic Materials. 1996 ; Vol. 164, No. 1-2. pp. 53-60.
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