Electrical and Magnetic Properties of Quasicrystal Approximants RCd<sub>6</sub> (R: Rare Earth)
作者:Akinobu Mori、Hisashi Ota、Shingo Yoshiuchi、Ken Iwakawa、Yuki Taga、Yusuke Hirose、Tetsuya Takeuchi、Etsuji Yamamoto、Yoshinori Haga、Fuminori Honda、Rikio Settai、Yoshichika Ōnuki
DOI:10.1143/jpsj.81.024720
日期:2012.2.15
We measured the electrical resistivity, magnetic susceptibility, magnetization, and specific heat of the quasicrystal approximants RCd 6 (R: rare earth, Y–Lu) with a body-centered cubic (bcc) crystal structure. Single crystals were grown by the Cd-self flux method and annealing method. We confirmed that the structural order–disorder transition is realized at about 160 K when the lattice constant a
我们测量了具有体心立方 (bcc) 晶体结构的准晶近似物 RCd 6(R:稀土,Y-Lu)的电阻率、磁化率、磁化强度和比热。通过Cd-自熔法和退火法生长单晶。我们证实,当 YCd 6 中的晶格常数 a 大于 15.481 A 时,即 R = Pr、Nd、Sm、Gd、Tb、Dy 和 Yb 时,结构有序 - 无序转变在约 160 K 处实现。在较低温度下,发现 RCd 6 化合物,除了非 4 f 参考化合物 YCd 6 和 LuCd 6 以及二价化合物 YbCd 6 外,均呈反铁磁性有序排列。我们澄清了结构有序 - 无序转变对磁有序和传输特性有很大影响。RCd 6 (R: Nd, Sm, Tb,