Apparent poisson’s ratio for fe-ga alloy single crystal due to magnetostriction

Masaki Fujita, Takehito Ikeuchi, Akihiro Koyama, Muneyuki Imafuku, Shun Fujieda, Shigeru Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Fe-Ga alloys are used for practical magnetostrictive materials. The understanding of mechanical properties under magnetic field is very important for their application to vibration power generation devices. Especially, Poisson’s ratio is one of key parameters because it is strongly related with the volume change of materials. In the study, we investigated actual behavior of Poisson’s ratio due to magnetostriction, instead of just the mechanical one. The sample was cube-oriented Fe-18mol%Ga single crystal disc. Static magnetic fields were applied in various directions parallel to (001). Strain values in various directions were measured by strain gauge and X-ray diffraction. And then, tri-axial strain analysis for single crystal was carried out. Theoretically, Poisson’s ratio due to magnetostriction is known to be 0.5, (volume conservative), value is close to the mechanical one, 0.45. On the other hand, we found that Poisson’s ratio exhibits anisotropic behavior despite the elastic constants are equivalent in [010] and [001]. This phenomenon is attributable to the magnetic domain structure under zero magnetic field. In this presentation, we will discuss this apparent Poisson’s ratio considering the volume strain and magnetostriction comprehensively.

Original languageEnglish
Title of host publicationTHERMEC 2018
EditorsR. Shabadi, Mihail Ionescu, M. Jeandin, C. Richard, Tara Chandra
PublisherTrans Tech Publications Ltd
Number of pages5
ISBN (Print)9783035712087
Publication statusPublished - 2018
Event10th International Conference on Processing and Manufacturing of Advanced Materials, 2018 - Paris, France
Duration: 2018 Jul 92018 Jul 13

Publication series

NameMaterials Science Forum
Volume941 MSF
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752


Conference10th International Conference on Processing and Manufacturing of Advanced Materials, 2018


  • Fe-Ga alloy
  • Magnetostriction
  • Poisson’s ratio
  • Volume strain
  • X-ray diffraction method

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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