Multi-step magnetic transitions in EuNiIn
EuNiIn
における磁気多段転移
池田 修悟*; 金子 耕士
; 田中 佑季*; 川崎 卓郎
; 花島 隆泰*; 宗像 孝司*; 中尾 朗子*; 鬼柳 亮嗣
; 大原 高志
; 望月 健生*; 近藤 晃弘*; 金道 浩一*; 本間 佳哉*; Frontzek, M. D.*; 小林 寿夫*
Ikeda, Shugo*; Kaneko, Koji; Tanaka, Yuki*; Kawasaki, Takuro; Hanashima, Takayasu*; Munakata, Koji*; Nakao, Akiko*; Kiyanagi, Ryoji; Ohara, Takashi; Mochizuki, Kensei*; Kondo, Akihiro*; Kindo, Koichi*; Homma, Yoshiya*; Frontzek, M. D.*; Kobayashi, Hisao*
Magnetism in EuNiIn
has been studied by specific heat, magnetic susceptibility, magnetization,
Eu M
ssbauer spectroscopy, and neutron diffraction experiments. The specific heat shows two magnetic transitions at
and
at zero magnetic field. An antiferromagnetic ground state of EuNiIn
has a uniaxial magnetic anisotropy along the b-axis, revealed by the magnetic susceptibility and the M
ssbauer spectroscopy. Single crystal neutron diffraction experiments clarify that this antiferromagnetic structure in the ground state is characterized by the commensurate propagation vector
= (1/2, 1/2, 1/2) which reveals no distinct anomaly at
. The magnetization curve along the b-axis at 2 K shows four successive magnetic field-induced transitions up to 50 kOe and, reaches 7
/f.u. above 190 kOe, The magnetic phase diagram in EuNiIn
has unique characteristics with five magnetic states in low magnetic field.