...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Crystal Growth >Structural and magnetic properties of single-crystalline spinel systems ZnCr_(2-x) In_xSe_4
【24h】

Structural and magnetic properties of single-crystalline spinel systems ZnCr_(2-x) In_xSe_4

机译：单晶尖晶石系统ZnCr_（2-x）In_xSe_4的结构和磁性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The single crystals of In~(3+)-doped zinc chromium selenide spinel ZnCr_2Se_4 were prepared by a chemical transport method and characterized by X-ray diffraction, magnetic measurements and ESR spectro-scopy in order to examine an effect of nonmagnetic indium on the structural and magnetic properties of the system. The X-ray diffraction analysis has shown that only small amount of In entered the octahedral sites in the cubic spinel structure with space group Fd3m. As compared with parent ZnCr_2Se_4, the unit cell dimensions increased slightly with increasing In content, however at the In concentration of about 10%, the structures exhibited a certain amount of octahedral vacancies. For examined compounds the Neel temperature is very similar to that of the parent spinel ZnCr_2Se_4, whereas the paramagnetic Curie temperature is much lower (of about 59 K) than that for matrix. It means that the frustration introduced into systems by B-sublattice indium dilution reflects the change of ferromagnetic interactions in the magnetic exchange. The temperature dependence of the ESR linewidth over region (T/T_n) ＞ 8 is interpreted by an occurrence of spin-phonon interaction. The interesting feature of the low-field magnetization is that the magnetic irreversibility observed in the separation of the FC and ZFC curves below T_N is consistent with a new, weak resonance-like features.
机译：采用化学迁移法制备了In〜（3+）掺杂的硒化锌铬尖晶石ZnCr_2Se_4单晶，并通过X射线衍射，磁测量和ESR光谱等方法表征了单晶，从而研究了非磁性铟对铟的影响。系统的结构和磁性。 X射线衍射分析表明，只有少量的In进入具有空间群Fd3m的立方尖晶石结构的八面体位置。与母体ZnCr_2Se_4相比，晶胞尺寸随In含量的增加而略有增加，但是在In浓度约为10％时，结构表现出一定量的八面体空位。对于所检测的化合物，尼尔温度与母体尖晶石ZnCr_2Se_4的温度非常相似，而顺磁性居里温度（约59 K）比基质温度低得多。这意味着由B-亚晶格铟稀释引入系统的受阻反映了磁交换中铁磁相互作用的变化。 ESR线宽在整个区域（T / T_n）＞ 8的温度依赖性可以通过自旋声子相互作用的发生来解释。低场磁化的有趣特征是，在T_N以下的FC和ZFC曲线的分离中观察到的磁性不可逆性与新的，类似于共振的弱特征一致。

著录项

  • 来源
    《Journal of Crystal Growth》 |2010年第3期|471-477|共7页
  • 作者

    D. Skrzypek; E. Malicka; A. Waskowska; A. Cichon;

  • 作者单位

    A.Chelkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland;

    rnInstitute of Chemistry, University of Silesia, Bankowa 14, 40-007 Katowice, Poland;

    rnInstitute of Low Temperature and Structure Research, Polich Academy of Sciences, 50-422 Wroclaw, Poland;

    rnA.Chelkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Crystal structure; A1. X-ray diffraction; A2. Bulk crystal growth; B2. Magnetic materials;

    机译：A1。晶体结构A1。 X射线衍射;A2。大块晶体生长;B2。磁性材料;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

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