Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu5 and EuAu5 with the characteristic hexagonal structure
Quasi-one-dimensional magnetic interactions and conduction electrons in EuCu5 and EuAu5 with the characteristic hexagonal structure
复制标题
具有特征六方结构的 EuCu5 和 EuAu5 中的准一维磁相互作用和传导电子
DOI：
10.1080/14786435.2019.1708498
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发表时间：
2020
影响因子：
1.6
通讯作者：
Onuki Y.
中科院分区：
文献类型：
--
作者：
Matsuda S.;Ota J.;Nakaima K.;Iha W.;Gouchi J.;Uwatoko Y.;Nakashima M.;Amako Y.;Honda F.;Aoki D.;Nakamura A.;Takeuchi T.;Haga Y.;Harima H.;Hedo M.;Nakama T.;Onuki Y.
我们用坩埚下降法成功地生长出六方结构的EuCu和EuAu单晶。这两种化合物都是铁磁体，居里温度分别为和13 K，穆斯堡尔实验表明EuCu的Eu-4f磁矩沿沿着六方轴或[0001]方向取向。在本实验中，EuCu和EuAu在2K下的磁化强度在2kOe的极低磁场下饱和，Eu矩为。另一方面，[0001]的难磁化轴在40 kOe的高磁场下饱和。在室温下，EuCu和EuAu的电阻率沿着电流[0001]方向约为30 - 40，而[0001]的电阻率为30 - 40。准一维电导率也是特征性的，这从EuAu的de Haas-van Alphen（dHvA）实验和FLAPW能带计算中得到澄清，揭示了大的板状费米表面的存在。
We have succeed in growing single crystals of EuCuand EuAuwith the hexagonal structure by the Bridgman method. Both compounds are known to be ferromagnets with Curie temperaturesand 13 K, respectively, and the Eu-4fmagnetic moments of EuCuare known to orient along the hexagonalc-axis or the [0001] direction by the Mössbauer experiment. The magnetisations at 2 K in EuCuand EuAuin the present experiment saturate at an extremely low field of 2 kOe for, with a Eu-moment of. On the other hand, the hard-axis magnetisations for[0001] saturate at a high field of 40 kOe. It is also found from the electrical resistivty measurement that the electrical resistivities along the current[0001] in EuCuand EuAuare aboutat room temperature, which are compared with the resistivities of30–40for[0001]. The quasi-one dimensional conductivities are also characteristic, which were clarified from the de Haas-van Alphen (dHvA) experiment and FLAPW energy band calculation for EuAu, revealing the existence of a large plate-like Fermi surface.