Revisited magnetic phase diagram for CeNi1-xCux system: spin-glass in the weak interaction limit.

We report the revisited magnetic phase diagram for the Kondo (ferromagnetic and antiferromagnetic) CeNi1−xCux series based on ac–dc magnetization, heat capacity, neutron diffraction and muon spectroscopy down to very low temperatures (~100 mK). An evolution from antiferromagnetism, observed for Cu-rich alloys (0.8 ≤ x ≤ 1), to clustered-ferromagnetism, seen for samples with 0.

Mesoscopic magnetic states in metallic alloys with strong electronic correlations: a percolative scenario for CeNi 1-x Cux.

We present evidence for the existence of magnetic clusters of approximately 20 A in the strongly correlated alloy system CeNi 1-x Cux (0.7 View Article and Find Full Text PDF

Size effects in the magnetic behaviour of TbAl(2) milled alloys.

The study of the magnetic properties depending upon mechanical milling of the ferromagnetic polycrystalline TbAl(2) material is reported. Rietveld analysis of the x-ray diffraction data reveals a decrease in the grain size down to 14 nm and a -0.15% variation in the lattice parameter, after 300 h of milling time.

Possible quantum critical point in La(2/3)Ca(1/3)Mn(1-x)Ga x O3.

We study the magnetic ground state in La(2/3)Ca(1/3)Mn(1-x)Ga x O3 manganites, where a quantum critical point (QCP) has been theoretically predicted. The metallic ferromagnetic ground state for low Ga doping breaks down for x > or = 0.11, an insulating state being established at low temperatures.