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Journal Articles

Neutron diffraction study on martensitic transformation under compressive stress in an ordered Fe$$_{3}$$Pt

Fukuda, Takashi*; Yamaguchi, Takashi*; Kakeshita, Tomoyuki*; Harjo, S.; Nakamoto, Tatsushi*

Journal of Applied Physics, 126(2), p.025107_1 - 025107_6, 2019/07

AA2019-0505.pdf:1.15MB

 Times Cited Count:1 Percentile:10.83(Physics, Applied)

Journal Articles

Stress and temperature dependence of the structure of the martensite and X-phase in Ni$$_{2}$$MnGa

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

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

 Times Cited Count:6 Percentile:40.78(Materials Science, Multidisciplinary)

The stress and temperature dependence of the structure of the X-phase in Ni$$_{2}$$MnGa 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 Ni$$_{2}$$MnGa depends strongly on stress and temperature compared to the M- or I-phase. In association with the X $$rightarrow$$ M transformation, both the position and intensity of the satellite reflection changes drastically, regardless of stress and temperature, while with X $$rightarrow$$ P transformation, the intensity of the satellite reflection fades gradually. For the I $$rightarrow$$ 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 Ni$$_{2}$$MnGa.

Journal Articles

Structural relation between the X-phase and other phases in Ni$$_{2}$$MnGa

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

Materials Science Forum, 635, p.49 - 54, 2009/12

We have investigated stress and temperature dependences of the structure of the X-phase in Ni$$_{2}$$MnGa to understand structural relation between the X-phase and other phases. We found that the structure change associated with the transformation from the intermediate (I-) phase to the X-phase is discontinuous under a compressive stress, while it is continuous under zero stress. In addition, the transformation from the X-phase to the L2$$_{1}$$-type parent phase is continuous regardless of applied stress. These results strongly suggest the existence of multi-critical point in Ni$$_{2}$$MnGa.

Journal Articles

Incommensurate structures of intermediate phase and martensite phase in Ni$$_{2}$$MnGa

Kushida, Hiroaki*; Fukuda, Kodai*; Terai, Tomoyuki*; Fukuda, Takashi*; Kakeshita, Tomoyuki*; Oba, Takuya*; Osakabe, Toyotaka; Kakurai, Kazuhisa; Kato, Kenichi*

Journal of Physics; Conference Series, 165, p.012054_1 - 012054_4, 2009/06

Journal Articles

Neutron diffraction study on stress-induced X-phase in Ni$$_{2}$$MnGa

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

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

 Times Cited Count:8 Percentile:49.11(Nanoscience & Nanotechnology)

Journal Articles

Crystal structure of martensite and intermediate phases in Ni$$_{2}$$MnGa studied by neutron diffraction

Kushida, Hiroaki*; Fukuda, Kodai*; Terai, Tomoyuki*; Fukuda, Takashi*; Kakeshita, Tomoyuki*; Oba, Takuya*; Osakabe, Toyotaka; Kakurai, Kazuhisa; Kato, Kenichi*

European Physical Journal; Special Topics, 158(1), p.87 - 92, 2008/05

 Times Cited Count:20 Percentile:71.88(Physics, Multidisciplinary)

Journal Articles

Direct observation of field-induced variant transformation in Fe$$_3$$Pt using pulsed magnetic field X-ray diffraction

Ouyang, Z. W.*; Matsuda, Yasuhiro*; Nojiri, Hiroyuki*; Inami, Toshiya; Owada, Kenji; Tsubota, Masami*; Sakon, Takuo*; Fukuda, Takashi*; Kakeshita, Tomoyuki*

Journal of Applied Physics, 102(11), p.113917_1 - 113917_6, 2007/12

 Times Cited Count:1 Percentile:5.72(Physics, Applied)

Oral presentation

Meta-magnetic transition of La$$_{1.37}$$Sr$$_{1.63}$$Mn$$_{2}$$O$$_{7}$$ under hydrostatic pressure

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

no journal, , 

no abstracts in English

Oral presentation

Magnetic structure analysis on La$$_{2-2x}$$Sr$$_{1+2x}$$Mn$$_{2}$$O$$_{7}$$ (x=0.315) by neutron diffraction

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

no journal, , 

no abstracts in English

Oral presentation

Neutron diffraction studies on the martensite phase and intermediate phase of Ni$$_{2}$$MnGa alloy crystal

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

no journal, , 

no abstracts in English

Oral presentation

Magnetic structure analysis in La$$_{2-2x}$$Sr$$_{1+2x}$$Mn$$_{2}$$O$$_{7}$$ (x=0.307) by a neutron diffraction measurement

Sonomura, Hirosuke*; Terai, Tomoyuki*; Kakeshita, Tomoyuki*; Osakabe, Toyotaka; Kakurai, Kazuhisa

no journal, , 

no abstracts in English

Oral presentation

Direct observation of higher order atomistic structure in Ti$$_{50}$$Ni$$_{44}$$Fe$$_{6}$$ at lower temperature phase

Hu, W.; Hayashi, Koichi*; Happo, Naohisa*; Hosokawa, Shinya*; Terai, Tomoyuki*; Fukuda, Takashi*; Kakeshita, Tomoyuki*; Takahashi, Masamitsu

no journal, , 

Oral presentation

Precursor phenomena of martensitic transformation in Fe-doped Ti-Ni alloys studied by X-ray fluorescence holography

Hu, W.; Hayashi, Koichi*; Happo, Naohisa*; Terai, Tomoyuki*; Fukuda, Takashi*; Kakeshita, Tomoyuki*; Takahashi, Masamitsu

no journal, , 

13 (Records 1-13 displayed on this page)
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