In-Situ Study of Temperature- and Magnetic-Field-Induced Incomplete Martensitic Transformation in Fe-Mn-Ga

Xiaoming Sun*, Jingyi Cui, Shaofu Li, Zhiyuan Ma, Klaus Dieter Liss, Runguang Li, Zhen Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Significant interest in the stoichiometric and off-stoichiometric Fe2MnGa alloys is based on their complex phase transition behavior and potential application. In this study, temperature- and magnetic-field-induced phase transformations in the Fe41.5Mn28Ga30.5 magnetic shape memory alloy were investigated by in situ synchrotron high-energy X-ray diffraction and in situ neutron diffraction techniques. It was found that incomplete phase transformation and phase coexistence behavior are always observed while applying and removing fields in Fe41.5Mn28Ga30.5. Typically, even at 4 K and under 0 T, or increasing the magnetic field to 11 T at 250 K, it can be directly detected that the martensite and austenite are in competition, making the phase transition incomplete. TEM observations at 300 K and 150 K indicate that the anti-phase boundaries and B2 precipitates may lead to field-induced incomplete phase transformation behavior collectively. The present study may enrich the understanding of field-induced martensitic transformation in the Fe-Mn-Ga magnetic shape memory alloys.

Original languageEnglish
Article number1242
Issue number8
StatePublished - Aug 2023


  • Fe-Mn-Ga
  • incomplete phase transformation
  • magnetic shape memory alloy
  • martensitic transformation


Dive into the research topics of 'In-Situ Study of Temperature- and Magnetic-Field-Induced Incomplete Martensitic Transformation in Fe-Mn-Ga'. Together they form a unique fingerprint.

Cite this