Stress and temperature dependence of the structure of the martensite and X-phase in NiMnGa

Fukuda, Takashi*; Terai, Tomoyuki*; Kushida, Hiroaki*; Kakeshita, Tomoyuki*; Osakabe, Toyotaka; Kakurai, Kazuhisa

Philosophical Magazine, 90(14), p.1925 - 1935, 2010/05

https://doi.org/10.1080/14786430903571479

The stress and temperature dependence of the structure of the X-phase in NiMnGa has been investigated by neutron diffraction measurements under compressive stress to clarify the structural relationship among the P-, I-, M- and X-phases. The structure of the X-phase in NiMnGa depends strongly on stress and temperature compared to the M- or I-phase. In association with the X M transformation, both the position and intensity of the satellite reflection changes drastically, regardless of stress and temperature, while with X P transformation, the intensity of the satellite reflection fades gradually. For the I X transformation, the position and intensity of the satellite changes drastically when transformation occur under compressive stress, while the changes are continuous under zero stress. These results strongly suggest the existence of a multicritical point in NiMnGa.

Neutron diffraction study on stress-induced X-phase in NiMnGa

Kushida, Hiroaki*; Terai, Tomoyuki*; Fukuda, Takashi*; Kakeshita, Tomoyuki*; Osakabe, Toyotaka; Kakurai, Kazuhisa

Scripta Materialia, 60(4), p.248 - 250, 2009/02

https://doi.org/10.1016/j.scriptamat.2008.10.018

Magnetic structure analysis on LaSrMnO (x=0.315) by neutron diffraction

Murata, Takeshi*; Kushida, Hiroaki*; Terai, Tomoyuki*; Kakeshita, Tomoyuki*; Osakabe, Toyotaka; Kakurai, Kazuhisa

no journal, , 

no abstracts in English