We present a correlation between structural and magnetic properties of different (Ge,Mn) nanostructures grown on Ge(001) and Ge(111) substrates. Thin films of Ge1-x Mn-x were grown by low temperature molecular beam epitaxy to favor the out-of-equilibrium growth. Depending on the growth conditions crystalline or amorphous (Ge,Mn) nanocolumns have been observed on Ge(001) substrates. The magnetic properties were probed by superconducting quantum interference device (SQUID), vibrating sample magnetometer (VSM) and electron paramagnetic resonance (EPR). With the help of these complementary techniques (SQUID and EPR), magnetic anisotropy in these nano structures has been investigated and different anisotropy constants were calculated.
机构:
State Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of SciencesState Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of Sciences