Investigation of phonon behavior in Pr2NiMnO6 by micro-Raman spectroscopy

Abstract

The temperature dependence of phonon excitations and the presence of spin phonon coupling in polycrystalline Pr2NiMnO6 samples were studied using micro-Raman spectroscopy and magnetometry. Magnetic properties show a single ferromagnetic-to-paramagnetic transition at 228 K and a saturation magnetization close to 4.95 \muB/f.u.. Three distinct Raman modes at 657, 642, and 511 cm-1 are observed. The phonon excitations show a clear hardening due to anharmonicity from 300 K down to 10 K. Further, temperature dependence of the 657 cm-1 mode shows only a small softening. This reflects the presence of a relatively weak spin-phonon coupling in Pr2NiMnO6 contrary to other double perovskites previously studied.

arXiv comment10 pages, 4 figs

References in corpus (5)

• Long-range Ni/Mn structural order in epitaxial double perovskite La2NiMnO6 thin films
• Absence of long-range Ni/Mn ordering in ferromagnetic La2NiMnO6 thin films
• Influence of Ni/Mn cation order on the spin-phonon coupling in multifunctional La2NiMnO6 epitaxial films by polarized Raman spectroscopy
• A radical approach to promote multiferroic coupling in double perovskites
• Raman Scattering in charge ordered Pr_{0.63}Ca_{0.37}MnO_{3} : Anomalous Temperature Dependence of Linewidth

Cited by in corpus (5)

• Griffiths phase-like behaviour and spin-phonon coupling in double perovskite Tb${}_2$NiMnO${}_6$
• Spin-Phonon coupling in Y${}_2$NiMnO${}_6$ double perovskite probed by Raman spectroscopy
• Probing the multi spin-phonon coupling and local B-site disorder in Pr2CoFeO6 by Raman spectroscopy and correlation with its electronic structure by X-ray photoemission spectroscopy
• Spin-phonon coupling in Gd(Co1/2Mn1/2)O3 perovskite
• Electronic structure and magnetic properties of 3d-4f double perovskite material