Magnetization processes caused by iron substitution in cubic laves phases
Received 16 May 1979, Available online 9 August 2002.
Abstract
The magnetic properties of cubic Laves phases RE(Fe, M)2, M = Al, Co, Rh are discussed. Pauli-paramagnetism is obtained for all three YM2 compounds. The appearance of a percolation limit for the onset of long-range ferromagnetic order which depends strongly on the matrix susceptibility is characteristic for all investigated series Y (Fe, M)2. Mictomagnetic behaviour can be deduced from magnetic, Mössbauer- and neutron depolarization measurements below the percolation limit. A Co moment of approximately 1 μB is induced in RECo2 compounds, RE = Gd, Dy, Ho. On the contrary Rh has no magnetic moment in these compounds. Within the RE(Fe, Co)2 series a Co moment is induced by both the RE and Fe atoms, whereas within RE(Fe, Rh)2 the Rh atoms will only be influenced by the substituted Fe. In all compounds the spin of the heavy RE atoms couples antiparallel to the spin of the transition metal atoms. Local environment effects are important for all Fe containing series whereas the properties of RECo2 compounds evidence itinerant electron metamagnetism.
Hello, my name is Dr Abderrahmane Reggad. I'm a 51 year old and I am a researcher in materials' sciences.
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