Search for quantum-tricritical-point in antiferromagnet CeRu${}_2$(Si${}_{1-x}$Ge${}_x$)${}_2$

H. Shinya, F. Ito, N. Kabeya +2

CeRu${}_2$Si${}_2$ is a well-known heavy fermion paramagnet, and substituting Ge for Si induces antiferromagnetism. This antiferromagnetism is Ising-like and has a tricritical point in…