Ferromagnetism and possible heavy-fermion behavior in single crystals of Nd Os 4 Sb 12
Ferromagnetism and possible heavy-fermion behavior in single crystals of Nd Os 4 Sb 12
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Nd Os 4 Sb 12 单晶中的铁磁性和可能的重费米子行为
DOI：
10.1103/physrevb.72.094410
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发表时间：
2004
影响因子：
3.7
通讯作者：
G. Giester
中科院分区：
文献类型：
--
作者：
P. Ho;W. Yuhasz;N. Butch;N. A. Frederick;T. Sayles;J. Jeffries;M. Maple;Jon Betts;A. Lacerda;P. Rogl;G. Giester
通过电阻率、磁化强度和比热测量对填充方钴矿化合物$\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$的单晶进行了研究。 $\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$晶体具有$\mathrm{La}{\mathrm{Fe}}_{4}{\mathrm{P}}_{12}$型立方结构，晶格参数为$9.3\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$。可能的重费米子行为是从比热测量中推断出来的，它揭示了一个大的电子比热系数 $\ensuremath{\gamma}\ensuremath{\approx}520\phantom{\rule{0.3em}{0ex}}\mathrm{mJ}∕\mathrm{mol}\phantom{\rule{0.2em}{0ex}}{\mathrm{K}}^{2}$，对应于有效质量${m}^{*}\ensuremath{\approx}98{m}_{e}$。与 $\ensuremath{\sim}0.9\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ 处的铁磁转变相关的特征可以在电阻率、磁化强度和比热中观察到。传统的阿罗特图分析表明$\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$符合平均场铁磁性。
Single crystals of the filled-skutterudite compound $\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$ have been investigated by means of electrical resistivity, magnetization, and specific heat measurements. The $\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$ crystals have the $\mathrm{La}{\mathrm{Fe}}_{4}{\mathrm{P}}_{12}$-type cubic structure with a lattice parameter of $9.3\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}}$. Possible heavy-fermion behavior is inferred from specific heat measurements, which reveal a large electronic specific heat coefficient $\ensuremath{\gamma}\ensuremath{\approx}520\phantom{\rule{0.3em}{0ex}}\mathrm{mJ}∕\mathrm{mol}\phantom{\rule{0.2em}{0ex}}{\mathrm{K}}^{2}$, corresponding to an effective mass ${m}^{*}\ensuremath{\approx}98{m}_{e}$. Features related to a ferromagnetic transition at $\ensuremath{\sim}0.9\phantom{\rule{0.3em}{0ex}}\mathrm{K}$ can be observed in electrical resistivity, magnetization, and specific heat. Conventional Arrott-plot analysis indicates that $\mathrm{Nd}{\mathrm{Os}}_{4}{\mathrm{Sb}}_{12}$ conforms to mean-field ferromagnetism.
稀土金属间化合物 YbNi 的手性磁性
DOI：
--
发表时间：
2019
期刊：
影响因子：
--
作者：
D. Kanai;R. Takayanagi;M. Okawa;Y. Kobayashi;A. Yasui;E. Ikenaga;and T. Saitoh;Shigeo Ohara
通讯作者：
Shigeo Ohara