Magnetic Properties of CeNi4MnyAl1-y Compounds

K. Synoradzki and T. Toliński Institute of Molecular Physics, Polish Academy of Sciences, M. Smoluchowskiego 17, 60-179 Poznań, Poland

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The magnetic properties of the polycrystalline CeNi4MnyAl1-y compounds have been investigated combining AC susceptibility, field-cooled and zero-field-cooled DC magnetization and magnetic relaxation measurements. The X-ray diffraction measurements showed that the group CeNi4MnyAl1-y is isostructural and crystallizes in the CaCu5-type structure (P6/mmm). For 0 < y < 1 irreversible magnetism, long-time magnetic relaxation effect and evident upshift of the AC susceptibility peak with increasing frequency are observed at low temperatures. The spin-glass-like behaviour originates from disorder due to the statistical occupation of the 3g site. Using our data we have constructed the tentative phase diagram.

DOI: 10.12693/APhysPolA.127.210 PACS numbers: 75.50.Lk, 71.20.Lp