Magnetic ordering in the fine particles of some bulk Pauli-paramgnets

Details Magnetic ordering in the fine particles of some bulk Pauli-paramgnets Magnetic ordering in the fine particles of some bulk Pauli-paramgnets

2009-06-26

arxiv.org/abs/0906.4887v1

Physics

Condensed Matter

Strongly Correlated Electrons

PRB (in press)

Scientific paper

Fine particles of some of the extensively studied 'enhanced' Pauli paramagnets - LuCo2, ScCo2, ZrCo2 and CeRu2Si2, have been prepared by high-energy ball-milling and investigated for their magnetic behavior. In the case of Co systems, these particles show ferromagnetic features even at room temperature. In the case of CeRu2Si2, a well-known Kondo lattice which is non-magnetic in the bulk form, features attributable to the onset of magnetic order below about 8 K could be seen in the fine particles. The magnitudes of the magnetic moment of these small particles at high fields are sufficiently large to conclude that the observed magnetic ordering is not just a surface effect. This transformation to magnetic ordering in small particles could be widespread among enhanced Pauli paramagnets.

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