M¨ossbauer Spectroscopy of Fe-doped Valence-fluctuating α-YbAlB4
M¨ossbauer Spectroscopy of Fe-doped Valence-fluctuating α-YbAlB4
Yui Sakaguchi(University of Hyogo); Shugo Ikeda(University of Hyogo); Hisao Kobayashi(University of Hyogo); Kentaro Kuga(University of Tokyo); Keita Sone(University of Tokyo); Satoru Nakatsuji(The University of Tokyo)
62권 12호, 2146~2149쪽
초록
The magnetic properties of high-quality 25 at.% Fe doped α-YbAlB4 with an orthorhombicPbam structure were investigated by using magnetization measurements and 57Fe M¨ossbauer spectroscopy. The temperature dependence of the magnetization along the a-axis showed anomaliesat TN2 7.7 K and TN1 10.4 K. Broadenings of the peaks in the M¨ossbauer spectrum wereobserved at temperatures below 6 K, which were due to the magnetic hyperfine fields transferredfrom the Yb magnetic moments. The evaluated transferred magnetic hyperfine field almost disappearsaround TN2. The anomalous temperature dependence of the transferred magnetic hyperfinefield reveals that the magnetic structure and the ordered magnetic moments of the Yb ions showcomplex temperature dependences at temperatures below TN1.
Abstract
The magnetic properties of high-quality 25 at.% Fe doped α-YbAlB4 with an orthorhombicPbam structure were investigated by using magnetization measurements and 57Fe M¨ossbauer spectroscopy. The temperature dependence of the magnetization along the a-axis showed anomaliesat TN2 7.7 K and TN1 10.4 K. Broadenings of the peaks in the M¨ossbauer spectrum wereobserved at temperatures below 6 K, which were due to the magnetic hyperfine fields transferredfrom the Yb magnetic moments. The evaluated transferred magnetic hyperfine field almost disappearsaround TN2. The anomalous temperature dependence of the transferred magnetic hyperfinefield reveals that the magnetic structure and the ordered magnetic moments of the Yb ions showcomplex temperature dependences at temperatures below TN1.
- 발행기관:
- 한국물리학회
- 분류:
- 물리학