Low-temperature electronic and magnetic properties of single-crystal Ni3S2.
Low-temperature electronic and magnetic properties of single-crystal Ni3S2.
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DOI：
10.1103/physrevb.50.2055
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发表时间：
1994-07
期刊：
影响因子：
--
通讯作者：
Metcalf;Crooker;McElfresh;Kakol;Honig
中科院分区：
文献类型：
--
作者：
Metcalf;Crooker;McElfresh;Kakol;Honig
电输运是测量一个晶体和多晶体样品的 ${\mathrm{Ni}}_{3}$${\mathrm{S}}_{2}$． 从300 K冷却到4.5 K时，样品表现出金属性质，相对电阻下降了两个数量级以上。低温热容数据由准绝热热脉冲法获得。确定电子热容量常数为2.7 mJ/${\mathrm{K}}^{2}$ ${\mathrm{mol}}_{\mathrm{Ni}}$． 单晶和多晶样品的磁化率为0.3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}6}$ Emu /g [0.4]\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}8}$ ${\mathrm{m}}^{3}$/g]，它与温度无关。确定泡利顺磁化率为5.0\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}5}$ 鸸鹋/${\mathrm{mol}}_{\mathrm{Ni}}$ [6.3]\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ ${\mathrm{m}}^{3}$/${\mathrm{mol}}_{\mathrm{Ni}}$]，校正了潜在的抗磁性。电输运、磁和热容测量的结果被用来表征电子结构。应用电子相关现象的标准理论表明 ${\mathrm{Ni}}_{3}$${\mathrm{S}}_{2}$ 可归类为磁性不稳定性和电子相互作用不重要的良好金属导体。
Electrical transport is measured for a crystal and polycrystalline samples of ${\mathrm{Ni}}_{3}$${\mathrm{S}}_{2}$. The samples display metallic behavior with the relative resistance decreasing by more than two orders of magnitude upon cooling from 300 to 4.5 K. Low-temperature heat-capacity data are obtained by the quasiadiabatic heat-pulse method. The electronic-heat-capacity constant is determined to be 2.7 mJ/${\mathrm{K}}^{2}$ ${\mathrm{mol}}_{\mathrm{Ni}}$. The magnetic measurements on single-crystal and polycrystalline samples yield a mass magnetic susceptibility of 0.3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}6}$ emu/g [0.4\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}8}$ ${\mathrm{m}}^{3}$/g], which is essentially temperature independent. The Pauli paramagnetic susceptibility is determined to be 5.0\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}5}$ emu/${\mathrm{mol}}_{\mathrm{Ni}}$ [6.3\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}10}$ ${\mathrm{m}}^{3}$/${\mathrm{mol}}_{\mathrm{Ni}}$], corrected for the underlying diamagnetism. Results of the electrical transport, magnetic, and heat-capacity measurements are used to characterize the electronic structure. Application of the standard theory of electron-correlation phenomena shows that ${\mathrm{Ni}}_{3}$${\mathrm{S}}_{2}$ may be categorized as a good metallic conductor for which magnetic instabilities and electronic interactions are of marginal importance.