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L. Udvardi, S. Khmelevskyi, L. Szunyogh, P. Mohn:
"Helimagnetism and competition of exchange interactions in bulk giant magnetoresistance alloys based on MnAu_{2}";
Physical Review B, 73 (2006), 1044461 - 1044466.

By using the generalized perturbation method within the screened Korringa-Kohn-Rostoker formalism we
calculate magnetic exchange interactions in the helimagnetic bulk MnAu2 compound upon alloying Mn with
Fe and Cr. The obtained interactions reproduce well the results of neutron diffraction experiments concerning
the periodicity of the helix in MnAu2 and its weakening with Fe substitution thus supporting the conventional
interpretation of a metamagnet-ferromagnet transitions due to external fields. In the case of Mn1−xCrxAu2
alloys our results reveal that the experimentally observed magnetization process follows a completely different
scenario, predicted theoretically a few decades ago for nearly orthogonal helimagnetics.

DOI: 10.1103/PhysRevB.73.104446 PACS number

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC05938238