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Cr75Fe16Mn9合金的低频内耗

吴柏枚 杨东升 盛 松 刘 卫 徐未名

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Cr75Fe16Mn9合金的低频内耗

吴柏枚, 杨东升, 盛 松, 刘 卫, 徐未名

LOW-FREQUENCY INTERNAL FRICTION IN Cr75Fe16Mn9

WU BAI-MEI, YANG DONG-SHENG, SHENG SONG, LIU WEI, XU WEI-MING
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  • 测量了自旋密度波材料Cr75Fe16Mn9的低频内耗,实验温区为100—600K,测量频率低于10Hz.在高于Néel温度的顺磁相中观察到450K附近的内耗峰和相应的总模量的跳变,反映了合金中各组分的自旋状态在微区内的无序-有序转变.在200—300K之间观察到一个宽的内耗峰区,它是由280K的单峰和270—220K延展的宽峰组成,其相对应的总模量表现为宽范围的少量减小.此宽峰可能与该合金中自旋密度波反铁磁转变以及磁多相共存有关.实验表明,
    The low-frequency internal friction in Cr75Fe16Mn9 alloy has been measured in temperature range of 100—600K and at frequencies lower that 10Hz. It is found that an internal fraction peak at 450K and corresponding jump of modules exist in the paramagnetic phase. This indicates there is a disorder-order transition on coupling states between individual spins for the Cr and Fe components. There is a broad internal friction peak in the temperature range from 200 to 300K, which consists of a peak at 280K and the extended broad peak at 220—270K. We suggest that this effect is the reflection of the spin density wave antiferromagnetic transition and the coexistence of different magnetic phases in the alloy. Our results reflect the fact that internal friction method would be a sensitive and effective probe for investigating the change of microstructure including electric structure.
    • 基金项目: 高等学校博士学科点专项科研基金(批准号:020903)资助的课题.
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  • 文章访问数:  5680
  • PDF下载量:  499
  • 被引次数: 0
出版历程
  • 收稿日期:  1998-06-18
  • 修回日期:  1998-01-05
  • 刊出日期:  1999-04-05

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