@article{33707, keywords = {Carbon dioxide, Manganese, X-ray Diffraction, Spin polarization, Cobalt, Spin dynamics, Germanium, Heusler, Anomalous X-ray diffraction, Antisite disorder, Atomic disorder, Band theory, Conduction electrons, Half metallic ferromagnets, Half metals, Heusler alloys, High precision, Spin state, Structural defect, Sub-lattices}, author = {B Ravel and J.O Cross and M.P Raphael and V.G Harris and Ramamoorthy Ramesh and L.V Saraf}, title = {Atomic disorder in Heusler Co 2MnGe measured by anomalous x-ray diffraction}, abstract = {Heusler alloys Co 2MnX, where X is Ge or Si, are predicted by the band theory to be a half-metallic ferromagnets, i.e., metals with all conduction electrons of the same spin state. To date, Heusler alloys have been measured with spin polarizations of 50%-60%, higher than Fe (∼40%), but not a true half metal. Structural defects involving site swapping between the Co and Mn sublattices have been proposed as a mechanism to diminish spin polarization. In this work, we present an anomalous x-ray diffraction measurement on Co 2MnGe to determine antisite disorder in thin films with a high precision. © 2002 American Institute of Physics. © 2002 American Institute of Physics.}, year = {2002}, journal = {Applied Physics Letters}, volume = {81}, number = {15}, pages = {2812-2814}, issn = {00036951}, doi = {10.1063/1.1513216}, note = {cited By 84}, language = {eng}, }