Magnetic and electronic properties of glassy (Fe72B24Nb4)95.5Y4.5 ferromagneticthin films fabricated using Pulsed Laser Deposition technique

• Magnetic and electrical properties have been studied for (Fe72B24Nb4)95.5Y4.5 ferromagnetic thin films fabricated using Pulsed Laser Deposition technique. Magnetic characterization shows that these thin films are soft ferromagnetic at room temperature with high saturating magnetic moment (averaged at 372.5 emu/cc). Magnetic data indicates mixed orientation of magnetic moments where mostly in-plane orientation of magnetic moments along with a minority contribution from out of plane magnetic moments. This arrangement of mixed orientation of magnetic moment is attributed to energy of LASER beam used for deposition. Electrical characterization show peculiar thickness dependence of electrical transport and corresponding optical behavior. Temperature dependence of resistivity shows a negative temperature coefficient of resistance which is characteristic of amorphous state. Mott and Efros-Shklovskii hopping mechanism were found to work under different temperature and thickness regimes for these thin films. Since these thin films are amorphous hence their physical properties are independent of choice of substrate and hence present a major advantage while fabricating magneto-optic devices for NEMS.

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TEKNIK OCH TEKNOLOGIER  -- Materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering (hsv//eng)

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