Journal of Inorganic Materials, Volume. 36, Issue 8, 865(2021)

Mechanism of the Magnetic and Specific-heat Anomalies in Rare-earth Dodecaborides RB12 (R=Tb-Tm): an Effect of Crystal-field-splitting Order Parameter

Jingsan HU1... Jianfei GU1, and Weiyi ZHANG12,* |Show fewer author(s)
Author Affiliations
  • 11. School of Physics, Nanjing University, Nanjing 210093, China
  • 22. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
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    Figures & Tables(6)
    Schematic diagram of crystal-levels
    Level scheme of 4f-orbitals of rare-earth ions in hole picture (a), and the measured and fitted TC of RB12 (b)
    Magnetic susceptibilities (a) and specific heat (b) of RB12 as functions of temperature
    • Table 1. Lattice constant,〈rn〉of rare-earth R and crystal-field-splitting energy of RB12

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      Table 1. Lattice constant,〈rn〉of rare-earth R and crystal-field-splitting energy of RB12

      RB12TbB12DyB12HoB12ErB12TmB12
      a/(0.1 nm) 7.5037.5007.4917.4837.475
      $\langle {{r}^{4}}\rangle $/(×10-4, nm4) 0.12950.11800.10810.099590.09206
      $\langle {{r}^{6}}\rangle $/(×10-6, nm6) 0.15050.13280.11810.10580.09530
      $\text{ }\!\!\Delta\!\!\text{ }_{1}^{0}$/meV7.536.366.365.905.49
      $\text{ }\!\!\Delta\!\!\text{ }_{2}^{0}$/meV14.2212.9911.9711.0910.31
    • Table 2. Debye temperature, corrected crystal-field-splitting parameters, and transition temperature of RB12

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      Table 2. Debye temperature, corrected crystal-field-splitting parameters, and transition temperature of RB12

      RB12${{\theta }_{\text{D}}}$/K$\text{ }\!\!\Delta\!\!\text{ }_{1}^{0}$/meV$\text{ }\!\!\Delta\!\!\text{ }_{2}^{0}$/meV${{T}_{\text{C}}}(\text{Cal}.)$/K${{T}_{\text{C}}}(\text{Exp}.)$/K[12]
      TbB1237710.6620.2122.6922.05
      DyB123759.4217.8116.6116.35
      HoB123747.6314.3810.697.38
      ErB123726.2411.746.526.65
      TmB123715.079.513.513.28
    • Table 3. Magnetic susceptibility and specific heat jumps near the magnetic anomaly of RB12(×10-6, m3·mol-1)

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      Table 3. Magnetic susceptibility and specific heat jumps near the magnetic anomaly of RB12(×10-6, m3·mol-1)

      RB12$\Delta \chi (\text{Exp}.)$$\Delta \chi (\text{Cal}.)$$\Delta C/R(\text{Exp}.)$$\Delta C/R(\text{Cal}.)$
      TbB12-2.391.42.46
      DyB123.894.151.21.72
      HoB125.656.91-1.43
      ErB126.9110.561.11.41
      TmB124.7715.582.02.16
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    Jingsan HU, Jianfei GU, Weiyi ZHANG. Mechanism of the Magnetic and Specific-heat Anomalies in Rare-earth Dodecaborides RB12 (R=Tb-Tm): an Effect of Crystal-field-splitting Order Parameter [J]. Journal of Inorganic Materials, 2021, 36(8): 865

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    Paper Information

    Category: RESEARCH ARTICLE

    Received: Nov. 3, 2020

    Accepted: --

    Published Online: Dec. 8, 2021

    The Author Email: ZHANG Weiyi (wyzhang@nju.edu.cn)

    DOI:10.15541/jim20200623

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