TY  - JOUR
AU  - Slipukhina, I.
AU  - Arras, E.
AU  - Mavropoulos, Ph.
AU  - Pochet, P.
TI  - Simulation of the enhanced Curie temperature in Mn5Ge3Cx compounds
JO  - Applied physics letters
VL  - 94
SN  - 0003-6951
CY  - Melville, NY
PB  - American Institute of Physics
M1  - PreJuSER-5500
SP  - 192505
PY  - 2009
N1  - S. acknowledges the CEA nanosciences program and P. M. the ESF SONS Contract No. ERAS-CT-2003-980409 for partial funding. The simulations were performed at the CCRT and at the Julich JSC in the framework of the collaboration between CEA and Helmholtz institutes.
AB  - Mn5Ge3Cx films with x >= 0.5 were experimentally shown to exhibit a strongly enhanced Curie temperature T-C compared to Mn5Ge3. In this letter we present the results of our first principles calculations within Green's function approach, focusing on the effect of carbon doping on the electronic and magnetic properties of the Mn5Ge3. The calculated exchange coupling constants revealed an enhancement of the ferromagnetic Mn-Mn interactions mediated by carbon. The essentially increased T-C in Mn5Ge3C is well reproduced in our Monte Carlo simulations and together with the decrease of the total magnetization is found to be predominantly of an electronic nature.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000266263400041
DO  - DOI:10.1063/1.3134482
UR  - https://juser.fz-juelich.de/record/5500
ER  -