1. Pressure-induced softening in bulk modulus due to magnetoelastic coupling in Nd2CoFeO6 double perovskite.
- Author
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Mukherjee, Bidisha, Sahu, Mrinmay, Samanta, Debabrata, Ghosh, Bishnupada, Joseph, Boby, and Dev Mukherjee, Goutam
- Subjects
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BULK modulus , *X-ray diffraction , *MAGNETICS , *TRANSITION metals , *MAGNETIC fields - Abstract
In the present work, we have investigated the structural response of transition metal double perovskite oxide Nd 2 CoFeO 6 under pressure by XRD and Raman spectroscopic measurements. From XRD data, we have observed a pressure-induced structural transition from the orthorhombic phase to the monoclinic phase at about 14.8 GPa. An anomalous increase in compressibility at a much lower pressure (∼ 1.1 GPa) is seen where no structural transition occurs. At about the same pressure, a sudden drop in the slope of the Raman shift is observed. Further investigation at low temperatures reveals that the B 1 g Raman mode is strongly affected by magnetic interactions. Additional high-pressure Raman experiments with the application of a magnetic field have indicated that the mentioned anomaly around 1.1 GPa can be explained by a high-spin to low-spin transition of Co 3 + . [ABSTRACT FROM AUTHOR]
- Published
- 2024
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