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Optical and magneto-optical properties of magnetic nanocomposites FePt-SiO2.
- Source :
- Journal of Applied Physics; 6/1/2004, Vol. 95 Issue 11, p6882-6884, 3p, 5 Graphs
- Publication Year :
- 2004
-
Abstract
- Structural, magnetic, magnetotransport, optical, and magneto-optical properties of (FePt)<subscript>1-X</subscript>(SiO<subscript>2</subscript>)<subscript>X</subscript> thin films in as-deposited state and after annealing were investigated. Magneto-optical properties were measured in the transversal Kerr effect (TKE) geometry. Magneto-optical spectra in nanocomposites (FePt)<subscript>1-X</subscript>(SiO<subscript>2</subscript>)<subscript>X</subscript> depend greatly on volume fraction of metal and annealing conditions. The TKE reaches the maximum value for compositions close to the percolation threshold X≈57% in as-deposited samples, as well as a maximum of the magnetoresistance. After annealing at 700 °C the TKE value significantly increases and the maximum of the magneto-optical response is observed at X≈70%. The magneto-optical spectra transformation after annealing is mainly due to the disorder-order phase transitions in FePt granules, changes in the mean granular size, and alloy microstructure. The TKE spectra calculated in the framework of the effective medium approximation for as-deposited samples are in good agreement with the experiment. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]
- Subjects :
- THIN films
ANNEALING of metals
KERR electro-optical effect
PERCOLATION
PHYSICS
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 95
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 13204036
- Full Text :
- https://doi.org/10.1063/1.1687537