Electronic States of Antiferromagnet FeSn and Pauli Paramagnet CoSn
Electronic States of Antiferromagnet FeSn and Pauli Paramagnet CoSn
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DOI：
10.7566/jpsj.88.014705
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发表时间：
2019-01-15
影响因子：
1.7
通讯作者：
Onuki, Yoshichika
中科院分区：
文献类型：
--
作者：
Kakihana, Masashi;Nishimura, Kengo;Onuki, Yoshichika
FeSn为反铁磁体，尼尔温度T-N = 370K，而CoSn为泡利顺磁体。我们培育了具有六边形结构的FeSn和CoSn的高质量单晶，主要通过测量FeSn的电阻率、比热、磁化率、磁化率和de Haas-van Alphen （dHvA）效应来研究FeSn的电子态。通过dHvA实验和能带计算，澄清了FeSn在反铁磁状态下的费米表面性质。发现主费米面沿六边形方向呈圆柱形[0001]，具有中等大小的回旋加速器质量m(c)* = 5.1m(0) （m(0)：电子的静止质量）。FeSn的室温电阻率rho（RT）与电流方向呈各向异性，rho(RT) = 75 ~ 175 mu ω。而CoSn对应的电阻率很小，rho(RT) = 4.5 μ ω .cm。
FeSn is an antiferromagnet with the Neel temperature T-N = 370K, while CoSn is a Pauli paramagnet. We grew high-quality single crystals of FeSn and CoSn with the hexagonal structure and mainly studied the electronic state of FeSn by measuring the electrical resistivity, specific heat, magnetic susceptibility, magnetization, and de Haas-van Alphen (dHvA) effect. The Fermi surface properties of FeSn in the antiferromagnetic state were clarified by the dHvA experiment and energy band calculation. The main Fermi surface is found to be cylindrical along the hexagonal [0001] direction, possessing a moderately large cyclotron mass m(c)* = 5.1m(0) (m(0): rest mass of an electron). The room-temperature resistivity rho(RT) of FeSn is anisotropic against the current direction, with rho(RT) = 75-175 mu Omega.cm, revealing a usual magnitude, while the corresponding resistivity of CoSn is very small, rho(RT) = 4.5 mu Omega.cm.