Abstract
Bulk magnetic properties of selected compounds in the series RMn 5−5c (R = rare earth) are studied. Mictomagnetic properties are pronounced for nonmagnetic or weakly magnetic rare earth analogs, but typical ferromagnetic behavior is seen for Sm analogs. Intrinsic magnetic hardness fields in the latter are quite large relative to their corresponding anisotropy fields, as compared to other typical CaCu 5 analogs. Thus, the strong Mn exchange fluctuations enhance domain wall pinning.
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