首页> 美国卫生研究院文献>Royal Society Open Science >First-principles calculations of structural electronic magnetic and elastic properties of Mo2FeB2 under high pressure
【2h】

First-principles calculations of structural electronic magnetic and elastic properties of Mo2FeB2 under high pressure

机译:高压下Mo2FeB2的结构电子磁和弹性性质的第一性原理计算

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

The structural, electronic, magnetic and elastic properties of Mo2FeB2 under high pressure have been investigated with first-principles calculations. Furthermore, the thermal dynamic properties of Mo2FeB2 were also studied with the quasi-harmonic Debye model. The volume of Mo2FeB2 decreases with the increase in pressure. Using the analysis of the density of the states, atom population and Mulliken overlap population, it is observed that as the pressure increases, the B–B bonds are strengthened and the B–Mo covalency decreases. Moreover, for all pressures, Mo2FeB2 is detected in the anti-ferromagnetic phase and the magnetic moments decrease with the increase in pressure. The calculated bulk modulus, shear modulus, Young's modulus, Poisson's ratio and universal anisotropy index all increase with the increase in pressure. From thermal expansion coefficient analysis, it is found that Mo2FeB2 shows good volume invariance under high pressure and temperature. The examination of the dependence of heat capacity on the temperature and pressure shows that heat capacity is more sensitive to temperature than to pressure.
机译:通过第一性原理计算研究了Mo2FeB2在高压下的结构,电子,磁性和弹性。此外,还利用准谐波德拜模型研究了Mo2FeB2的热力学性质。 Mo2FeB2的体积随着压力的增加而减小。通过分析状态密度,原子数量和穆里肯重叠数量,可以发现,随着压力的增加,BB键增强,BMo价降低。而且,对于所有压力,在反铁磁相中都检测到Mo2FeB2,并且磁矩随压力的增加而减小。计算得到的体积模量,剪切模量,杨氏模量,泊松比和通用各向异性指数均随压力的增加而增加。从热膨胀系数分析发现,Mo2FeB2在高压和高温下表现出良好的体积不变性。对热容对温度和压力的依赖性的检查表明,热容对温度比对压力更敏感。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号