Magnetic properties of the La0.9Ca0.1MnO3 polycrystalline under the pressure
School of Materials Science and Engineering, Anhui University, 230601, Hefei, China
2 School of Electronic Engineering, Huainan Normal University, 232038, Huainan, China
Accepted: 27 July 2022
Published online: 3 September 2022
In this work, we observed that the pressure has different influence on the magnetic properties of La0.9Ca0.1MnO3 in different temperature regions. At the ambient pressure, La0.9Ca0.1MnO3 exhibits a ferromagnetic transiton at the Curie temperature (Tc) of 191 K and a canted-antiferromagnetic transiton at 68 K. Above Tc, the pressure enhances the antiferromagnetic coupling of ferromagnetic clusters with the concomitant variation of anisotropy. Around Tc, the pressure suppresses the large Jahn–Teller distortion, linearly increasing Tc with the pressure coefficient of 15.9 K/GPa and simultaneously increasing the magentization. But the pressure reduces the magnetization below Tc due to the pressure-enhanced Jahn–Teller distortion and the interparticle dipolar interaction. Through analyses, it can be concluded that the pressure effects depend on the distortion degree of the MnO6 octahedra in different temperature regions.
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