Magnetic and structure properties of CoPt-In$_2$O$_3$ nanocomposite films

Liudmila E. Bykova^a, Victor G. Myagkov^a, Victor S. Zhigalov^a, Alexei A. Matsynin^a, Dmitry A. Velikanov^a, Galina N. Bondarenko^b, Gennady S. Patrin<sup>ca

a</sup> Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
^b Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
^c Siberian Federal University, Krasnoyarsk, Russian Federation

Abstract: The structural and magnetic properties of CoPt-In$_2$O$_3$ nanocomposite films formed by vacuum annealing of the In/(Co$_3$O$_4$ + Pt)/MgO film system in the temperature range of 100–800 $^\circ$C have been investigated. The synthesized nanocomposite films contain ferromagnetic CoPt grains with an average size of 5 nm enclosed in an In$_2$O$_3$ matrix, and have a magnetization of 600 emu/cm$^3$, and a coercivity of 150 Oe at room temperature. The initiation 200 $^\circ$C and finishing 800 $^\circ$C temperatures of synthesis were determined, as well as the change in the phase composition of the In/(Co$_3$O$_4$ + Pt)/MgO film during vacuum annealing.

Keywords: thin films, ferromagnetic nanocomposites, CoPt alloy, In$_2$O$_3$ oxide.

UDC: 537.9+539.216.2

Received: 06.04.2020
Received in revised form: 06.06.2020
Accepted: 06.07.2020

Language: English

DOI: 10.17516/1997-1397-2020-13-4-431-438

Bibliographic databases:

•