Magnetoresonance Research of Cox(Al2O3)1-x Nanogranular Films in the Vicinity of Magnetic Phase Transition

Magnetoresonance Research of Cox(Al2O3)1-x Nanogranular Films in the Vicinity of Magnetic Phase Transition

The ESR response of 35-40 GHz band from nanostructure Co x (Al 2 O 3 ) 1-x was analyzed. The linewidth increases while the Co concentration decreases. The magnetization of saturation drops to zero when Co concentration decreases up to concentration of Co falls up to metal-dielectric threshold. The m...

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Hauptverfasser: Bagmut, T.V., Kravets, A.F., Nedukh, S.V., Pogoreliy, A.N., Tarapov, S.I.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Application software
Frequency
Giant magnetoresistance
Magnetic field measurement
Magnetic films
Magnetization
Nanostructures
Paramagnetic resonance
Quantum computing
Temperature
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Zusammenfassung:The ESR response of 35-40 GHz band from nanostructure Co x (Al 2 O 3 ) 1-x was analyzed. The linewidth increases while the Co concentration decreases. The magnetization of saturation drops to zero when Co concentration decreases up to concentration of Co falls up to metal-dielectric threshold. The magnetic phase transition from ferromagnetic to superparamagnetic state has been detected in the vicinity of the metal-dielectric transition.
DOI:10.1109/MSMW.2007.4294814