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No.1(pp.1-41)

Home > Issues > Volume 6 (2001) > No.1(pp.1-41)

Sol-Gel Synthesis and Transport Properties of La_2/3Sr_1/3Mn_0.99⁵⁷Fe_0.01O₃ Granular Thin Films

Journal of Magnetics, Volume 6, Number 1, 31 Mar 2001, Pages 1-4

In-Bo Shim*

(Departments of Physics, Kookmin University), Sung-Baek Kim(Departments of Physics, Kookmin University), Geun-Young Ahn(Departments of Physics, Kookmin University), Sung-Roe Yun(Departments of Physics, Kookmin University), Young-Suk Cho(Departments of Physics, Kookmin University), Chul-Sung Kim(Departments of Physics, Kookmin University)

Abstract

We have used acetic acids ethanol and distilled water as a solvent to synthesize La_2/3Sr_1/3Mn_0.99⁵⁷Fe_0.01O₃(LSMFO) precursor. Crack-free LSMFO granular polycrystalline thin films have been deposited on thermally oxidized silicon substrates by spin coaling. The dependence of crystallization, surface morphology, magnetic and transport properties on annealing temperature was investigated. With increasing annealing temperature, the metal-semiconductor (insulator) transition temperature and the magnetic moment decrease while the resistivity increases. The lattice constants remain almost unchanged. For LSMFO thin films, spin-dependent interfacial tunneling and/or scattering magnetoresistance were observed. Our results indicate that the annealing temperature is very important in determining the intrinsic and extrinsic magnetotransport properties.

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