Field-Induced Order in Heavy-Fermion Compound Yb$Co_{2}$$Zn_{20}$

Koji Kaneko (1) , Stéphane Raymond (2) , E. Ressouche (2) , Gerard Lapertot (3) , Tetsuya Takeuchi (4) , Yusuke Hirose (5) , Fuminori Honda (6) , Yoshichika Ōnuki (7)

1 Japan Atomic Energy Agency
2 MDN - Magnétisme et Diffusion Neutronique
3 IMAPEC - Instrumentation, Material and Correlated Electrons Physics
4 Osaka University [Osaka]
5 Department of Physics [Niigata]
6 Tohoku University [Sendai]
7 University of the Ryukyus [Okinawa]

The field-induced ordered phase of heavy-fermion compound Yb$Co_{2}$$Zn_{20}$ was investigated by means of single crystal neutron diffraction. At an applied field of 11.8 T along the [1$\bar 1$1] direction, a superlattice peak was found at ($\bar 3$/2 $\bar 1$/2 1/2) at 200 mK, whereas no peak was detected at q = (1 0 0). In addition, broad diffuse scattering was revealed around induced superlattice peak. The present result evidences that the field-induced ordered phase has different character to the pressure induced antiferromagnetic ordered phase.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Electrons fortement corrélés [cond-mat.str-el]

Koji Kaneko, Stéphane Raymond, E. Ressouche, Gerard Lapertot, Tetsuya Takeuchi, et al.. Field-Induced Order in Heavy-Fermion Compound Yb$Co_{2}$$Zn_{20}$. Journal of the Physical Society of Japan Suppl., 2014, ⟨10.7566/JPSCP.3.011061⟩. ⟨hal-01937750⟩