Dramatic elastic response at the critical end point in UTe

UTeの臨界終点における劇的な弾性応答

Valika, M.*; Haidamak, T.*; Cabala, A.*; Pospil, J.*; Bastien, G.*; Sechovsk, V.*; Prokleka, J.*; 柳澤 達也*; Opletal, P.  ; 酒井 宏典   ; 芳賀 芳範   ; 宮田 敦彦*; Gorbunov, D.*; Zherlitsyn, S.*

Valika, M.*; Haidamak, T.*; Cabala, A.*; Pospil, J.*; Bastien, G.*; Sechovsk, V.*; Prokleka, J.*; Yanagisawa, Tatsuya*; Opletal, P.; Sakai, Hironori; Haga, Yoshinori; Miyata, Atsuhiko*; Gorbunov, D.*; Zherlitsyn, S.*

Elastic responses at the metamagnetic transition in UTe are studied at high field. The elastic anomaly becomes the strongest at the critical-end-point. Similar behavior was also observed in another metamagnet UCoAl, suggesting a universal elastic response triggered by critical magnetic fluctuations.