## Abstract

A study of the temperature-dependent magnetic susceptibility and electrical resistivity ρ(T) (0.5-300 K) on single-phase alloys (CaCu_{5} type), prepared by argon arc melting, reveals a magnetic phase transition with a nonmonotonous decrease of the ordering temperature from T_{c}=115 K for x=0 to T_{c}≈0 for x=0.40. A kink in the susceptibility at about 70 K indicates that ferromagnetism (at x<0.1) transforms to a complex magnetic order for 0.125≤x≤0.35. Above that concentration ρ(T)= ρ_{0}+AT^{n} changes from n≈2 to n≈1.5, a characteristic for non-Fermi-liquid behavior. Under pressure T_{c} stays almost constant for x=0.125 but dT_{c}/dp grows with increasing Ru content. On the contrary, applied fields up to 12 T do not affect T_{c}. Low-temperature specific heat and ac susceptibility for x=0.40 confirm the absence of long-range magnetic order down to 0.5 K. For x=0.35 C_{p}/T= 62 mJ/mol K at 1.5 K, a value which is three times larger than that of CeRh _{3}B_{2}.

Original language | English |
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Pages (from-to) | 6423-6425 |

Number of pages | 3 |

Journal | Journal of Applied Physics |

Volume | 83 |

Issue number | 11 |

DOIs | |

Publication status | Published - 1998 |

Externally published | Yes |