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<p>Structure and magnetic properties of intermetallic compounds Tb<sub>2</sub>Ni(Si<sub>1-<i>x</i></sub>Ge<sub><i>x</i></sub>)<sub>3</sub> were investigated with Ge-doping contents <i>x</i> = 0, 0.1 0.2 and 0.5. Based on XRD characterization, hexagonal AlB<sub>2</sub> type phase of Tb<sub>2</sub>NiSi<sub>3</sub> consists of Tb<i>-</i>ion layers and Ni-Si layers alternating arrangement along the <i>c</i>-axis was confirmed. After Ge doping, a chemically ordered secondary phase appears. With the increase of Ge-doping, content of the secondary phase increases. The magnetic measurements of dc susceptibility and ac susceptibility were done using a superconducting quantum interference device (SQUID) at low temperature. In the temperature dependence of dc susceptibility measurement, obvious anomalies are observed at about 12&#xa0;K and 4&#xa0;K for all the samples. At about 12&#xa0;K, long-range magnetic ordered phase transitions occur, the transition temperatures tend to increase when <i>x</i> increase. At about 4&#xa0;K, the samples show cluster like spin glass behaviors. The spin glass intensities enhance with the increasing in Ge-doping, which can be mainly attributed to the existence of chemically ordered secondary phase. </p>

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Spin glass behaviors of Ge-doped Tb2NiSi3 compound

  • 期刊论文

  • 发表日期：

    2025年6月28日

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  • Xiaojun Bai,
  • Luyao Wang,
  • Zhiyan Pan,
  • Ziyan Hao,
  • Shengnan Zhang,
  • Aiymkul A. Markhabayeva,
  • Vladislav Zadorozhnyy,
  • Chongde Cao

摘要

Structure and magnetic properties of intermetallic compounds Tb2Ni(Si1-xGex)3 were investigated with Ge-doping contents x = 0, 0.1 0.2 and 0.5. Based on XRD characterization, hexagonal AlB2 type phase of Tb2NiSi3 consists of Tb-ion layers and Ni-Si layers alternating arrangement along the c-axis was confirmed. After Ge doping, a chemically ordered secondary phase appears. With the increase of Ge-doping, content of the secondary phase increases. The magnetic measurements of dc susceptibility and ac susceptibility were done using a superconducting quantum interference device (SQUID) at low temperature. In the temperature dependence of dc susceptibility measurement, obvious anomalies are observed at about 12 K and 4 K for all the samples. At about 12 K, long-range magnetic ordered phase transitions occur, the transition temperatures tend to increase when x increase. At about 4 K, the samples show cluster like spin glass behaviors. The spin glass intensities enhance with the increasing in Ge-doping, which can be mainly attributed to the existence of chemically ordered secondary phase.