• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文OA文献 >Critical phenomena and estimation of the spontaneous magnetization by a magnetic entropy analysis in Mn(0.96)Nb(0.04)CoGe alloy
【2h】

Critical phenomena and estimation of the spontaneous magnetization by a magnetic entropy analysis in Mn(0.96)Nb(0.04)CoGe alloy

机译：Mn（0.96）Nb（0.04）CoGe合金的临界现象和自发磁化强度的磁熵分析

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。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Magnetic and magnetocaloric properties of the alloy Mn0.96Nb0.04CoGe have been investigated. According to the mean-field theory prediction, the relationship between Delta S-M proportional to (H/T-C)(2/3) has been confirmed in the temperature region near T-C for that system. To investigate the nature of the magnetic phase transition, a detailed critical exponent study has been performed. The critical components, gamma, beta, and delta determined using the Kouvel-Fisher method, the modified Arrott plot, as well as the critical isotherm analysis agree well. Moreover, these critical exponents are confirmed by the Widom scaling law and the validity of the calculated critical exponents was also confirmed by the scaling theory. The values deduced for the critical exponents are close to the theoretical prediction of the mean-field model values, thus indicating that long range interactions dominate the critical behavior in the Mn0.96Nb0.04CoGe system. It is also speculated that the competition between the localized Mn-Mn magnetic interactions should be responsible for the critical behavior in this system. Moreover, an excellent agreement is found between the spontaneous magnetization determined from the entropy change (-Delta S-M vs. M-2) and the classical extrapolation from the Arrott curves (H/M vs. M-2), thus confirming that the magnetic entropy change is a valid approach to estimate the spontaneous magnetization in this system. © 2013, American Institute of Physics.
机译：已经研究了Mn0.96Nb0.04CoGe合金的磁和磁热性质。根据平均场理论预测，已在该系统的T-C附近的温度区域中证实了与（H / T-C）（2/3）成比例的Delta S-M之间的关系。为了研究磁性相变的性质，已进行了详细的临界指数研究。使用Kouvel-Fisher方法确定的关键成分，γ，β和增量，改进的Arrott图以及关键的等温线分析都非常吻合。此外，这些关键指数已由Widom缩放定律证实，计算得出的关键指数的有效性也已由缩放理论确认。临界指数的推导值接近于平均场模型值的理论预测值，因此表明在Mn0.96Nb0.04CoGe系统中，长程相互作用主导了临界行为。还可以推测，局部Mn-Mn磁性相互作用之间的竞争应负责该系统中的关键行为。此外，在根据熵变确定的自发磁化强度（-ΔSM与M-2）与根据Arrott曲线进行的经典外推法（H / M与M-2）之间发现了极好的一致性，从而证实了熵变化是估计该系统中自发磁化强度的有效方法。 ©2013，美国物理研究所。

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