Pressure-induced softening in bulk modulus due to magnetoelastic coupling in Nd2CoFeO6 double perovskite

IF 2.7 3区物理与天体物理 Q2 PHYSICS, APPLIED

Journal of Applied Physics Pub Date : 2024-09-03 DOI:10.1063/5.0216316

Bidisha Mukherjee, Mrinmay Sahu, Debabrata Samanta, Bishnupada Ghosh, Boby Joseph, Goutam Dev Mukherjee

引用次数: 0

Abstract

In the present work, we have investigated the structural response of transition metal double perovskite oxide Nd2CoFeO6 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 B1g 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 Co3+.

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Nd2CoFeO6 双包晶石中磁弹性耦合导致的压力诱导体模量软化

在本研究中，我们通过 XRD 和拉曼光谱测量研究了过渡金属双包晶氧化物 Nd2CoFeO6 在压力下的结构响应。从 XRD 数据中，我们观察到在约 14.8 GPa 压力下，正方晶相向单斜晶相的结构转变。在更低的压力（∼1.1 GPa）下，压缩性出现异常增加，但没有发生结构转变。在大约相同的压力下，拉曼位移的斜率突然下降。低温下的进一步研究表明，B1g 拉曼模式受到磁相互作用的强烈影响。应用磁场进行的其他高压拉曼实验表明，上述 1.1 GPa 附近的异常现象可以用 Co3+ 的高自旋向低自旋转变来解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Physics 物理-物理：应用

CiteScore

5.40

自引率

9.40%

发文量

1534

审稿时长

2.3 months

期刊介绍： The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces