Magnetic, magnetocaloric and magnetoresonance properties of (1-x)la<inf>0.7</inf>sr<inf>0.3</inf>mno<inf>3</inf>/xgeo<inf>2</inf> (x=0, 0.15)

Abstract

© 2019 Trans Tech Publications, Switzerland. 0.85La0.7 Sr0.3 MnO3 /0.15GeO2 composite material and pure La0.7 Sr0.3 MnO3 were investigated by X-ray diffraction, scanning electron microscopy, magnetometry and electron spin resonance methods. It was observed that both samples demonstrate the ferromagnetic properties, while the absolute value of the magnetization, the magnetic entropy change and the magnetic ordering temperature decrease in composite in comparison with pure La0.7 Sr0.3 MnO3 . The electron spin resonance spectra of investigated (1-x)La0.7 Sr0.3 MnO3 /xGeO2 (x=0, 0.15) can be attributed to the superposition of electron spin resonance spectra from magnetically anisotropic particles with different orientations.