Investigation of commensurate-incommensurate structure modulation transitions in Ni-Mn-Ga-Fe martensite
There is still ongoing discussion on the true character of structural modulations in martensitic phases of Ni-Mn-Ga based magnetic shape memory alloys. Previous reports indicate commensurate (q=0.400) or incommensurate (0.400<q<0.428) structure modulation with the latter developing with temperature. Recently, we discovered sharp, thermally-induced, transitions between the commensurate and incommensurate modulated structures in Ni-Mn-Ga-Fe alloys. The aim of the current proposal is to investigate these transitions in detail. By combining the measurements with XRD and direct SEM and TEM observations of twins and nanotwins in the material, we expect to obtain some evidence on the true origin of the observed incommensurateness in the material.
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KLICPERA Milan; FABELO ROSA Oscar Ramon; o heczko; STRAKA Ladislav and VERTAT Petr. (2019). Investigation of commensurate-incommensurate structure modulation transitions in Ni-Mn-Ga-Fe martensite. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-15-626
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