著者
Kasaya Mitsuo Hihara Tadamiki Koi Yoshitaka
出版者
一般社団法人 日本物理学会
雑誌
Journal of the Physical Society of Japan (ISSN:00319015)
巻号頁・発行日
vol.34, no.1, pp.63-67, 1973
被引用文献数
22

Measurements of hyperfine field and quadrupole coupling of Co<SUP>59</SUP> have been made on the intermetallic compound Co<SUB>2</SUB>B. A large anisotropy in the hyperfine field is observed. The hyperfine fields along the local orthorhombic axes (<I>x</I>, <I>y</I>, and <I>z</I>) of the Co sites are &minus;53.7 kOe, &minus;83.1 kOe, and &minus;123.6 kOe, respectively, where the <I>z</I> axis is the two-fold axis which lies along the tetragonal &lang;110&rang; direction. The electric field gradients, |<I>q<SUB>xx</SUB></I>|, |<I>q<SUB>yy</SUB></I>|, and |<I>q<SUB>zz</SUB></I>|, are 1.43&times;10<SUP>24</SUP> cm<SUP>&minus;3</SUP>, 0.08&times;10<SUP>24</SUP> cm<SUP>&minus;3</SUP>, and 1.47&times;10<SUP>24</SUP> cm<SUP>&minus;3</SUP>, respectively. The charge distribution compatible with the observed electric field gradients suggests that the electronic states near the top of the band have a character of &psi;=&alpha;(3<I>z</I><SUP>2</SUP>&minus;<I>r</I><SUP>2</SUP>)+&beta;(<I>x</I><SUP>2</SUP>&minus;<I>y</I><SUP>2</SUP>).