Magnetic, Electrical and Magnetotransport Properties of Mg(Fe0.8Ga0.2)2O4 δ Obtained by Pyrohtdrolitic Method

A. V. Trukhanov; S. V. Trukhanov; O. P. Smirnov; A. A. Kulikov; H. Szymczak

doi:10.4236/oalib.1100842

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Open Access Library Journal > Vol.2 No.2, February 2015

Magnetic, Electrical and Magnetotransport Properties of Mg(Fe_0.8Ga_0.2)₂O_{4 δ} Obtained by Pyrohtdrolitic Method ()

A. V. Trukhanov^1*, S. V. Trukhanov¹, O. P. Smirnov², A. A. Kulikov², H. Szymczak³

¹Laboratory of Magnetic Films Physics, Scientific-Practical Materials Research Centre, Minsk, Belarus.
²Petersburg Nuclear Physics Institute, Gatchina, Russia.
³Institute of Physics of PAS, Warsaw, Poland.

DOI: 10.4236/oalib.1100842 PDF HTML XML 559 Downloads 820 Views Citations

Abstract

The magnetic, electrical and magnetotransport properties of spinel-type Mg(Fe_0.8Ga_0.2)₂O_{4 δ} ceramic ferrites have been investigated. The results of the investigations temperature and field dependences of magnetization and resistivity are presented and analyzed. The data of neutron scattering were found to be in good agreement with the Neel model of ferrimagnetism. This compound is magnetomonophase ferrimagnetic in the wide range of temperatures, and shows transition in paramagnet at high temperature (~490 K). Mg(Fe_0.8Ga_0.2)₂O_{4 δ} is characterized by maximal value of magnetization (28 emu/g) in the range of Mg(Fe_1－xGax)₂O_{4 δ} solid solutions. A negative magnetoresistance (MR) effect has been observed in Mg(Fe_0.8Ga_0.2)₂O_{4 δ} ferrite spinel. It has been determined that coefficient of the negative MR increased from 0.23% (at room temperature) to 7.28% (at 220 K). It can be explained with the help of the spin-dependent scattering on magnetic inhomogeneity of granular boundary.

Keywords

Ferrimagnetic Spinel Oxide, Magnetic Structure, Vibration Magnetometry, Neutron Powder Diffraction, Magnetotransport

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Trukhanov, A. , Trukhanov, S. , Smirnov, O. , Kulikov, A. and Szymczak, H. (2015) Magnetic, Electrical and Magnetotransport Properties of Mg(Fe_0.8Ga_0.2)₂O_{4 δ} Obtained by Pyrohtdrolitic Method. Open Access Library Journal, 2, 1-7. doi: 10.4236/oalib.1100842.

Conflicts of Interest

The authors declare no conflicts of interest.

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