ABSTRACT
Learning from serendipitous assembly, we have prepared a new family of designed 3d-4f Mn6Ln complexes. The dynamics of relaxation of the magnetization via alternating-current magnetic susceptibility for the new Mn6Ln complexes 1 (Ln = La), 2 (Ln = Tb), and 4 (Ln = Dy) have been studied down to 0.2 K.
ABSTRACT
Differential resistance spectra (dV/dI-V characteristics) have been measured for point contacts between the heavy-fermion superconductor (HFS) CePt(3)Si and a normal metal. Some contacts show a peak at V = 0 that is characteristic of HFS coexisting with a magnetic order such as UPd(2)Al(3), UNi(2)Al(3) and URu(2)Si(2). The evolution of the peak occurs well above the antiferromagnetic transition temperature T(N)â¼2.2 K, so that the direct relationship with the magnetic transition is questionable. The half-width of the peak seems to reflect the crystal field splitting or the spin-wave gap as observed for the above-mentioned HFSs, possibly suggesting that some common scattering process induces the zero-bias peaks in these materials.
