Abstract:
Electronic band-structure calculations are presented for the ferromagnetic compounds CrTe, Cr,Te, and Cr,Te,. In these compounds the Cr 3d-Te 5p covalency and the Cr 3dZz-Cr 3d12 overlap along the c axis are the most important interactions. The magnetic polarisation of Te is parallel to the Cr local moment in CrTe, antiparallel to it in Cr,Te, and about zero in Cr,Te,. Measurements of electronic transport properties (resistivity. Halleffect andthermo-electricpower) andmagneticpropertiesof Cr,_,)Te (6 = O.l)andCr,..,Te,(x = 0.2) indicate that these chromium tellurides are p-type metals, with strong interaction between the holes in the Te 5p band and the Cr magnetic moments. In the literature the variation of the magnetic properties of Cr? ?Te, near T, = 100 K has been attributed to a change from a canted antiferromagnetic to a collinear ferromagnetic structure. However, our Hall-effect measurements indicate that the spin structure is not collinear ferromagnetic above T,.
To download the article click on the link below:
0 Comments