Abstract
Magnetic measurements on the pseudo-ternary compounds Ho1-xYxRh2Si2, which substitute nonmagnetic Y for Ho, were performed. The lattice parameters a and c are almost constant by the change of Y composition x. The transition temperatures TN1, Tt, and TN2 decrease with increasing x. The critical compositions for TN1 and TN2 are determined to be xn1=0.98 and xN2=0.75, respectively. “The successive component-separated magnetic transitions” appear for the wide x region from x=0 to x=0.75. The partial ordered state, or frustration appears on these compound. The magnetic ordered state persists up to x=0.98 in spite of very dilute Ho-compounds: very weak magnetic interactions. The effective magnetic moments are almost constant from x=0 to 1; μeff=10.6 ±0.15 μB/Ho, and magnetic moment μ=10 μB/Ho as well. The Ho0.95Y0.05Rh2Si2 single crystal shows the quite similar magnetic behaviour to that of HoRh2Si2. The constant magnetic moment and constant effective magnetic moment irrespective of x are confirmed from the magnetic behaviours of single crystals Ho1-xYxRh2Si2 (x=0.05, 0.6 and 0.8).
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