TEM studies on the microstructure in ferromagnetic shape memory alloys

Y. Murakami, T. Yano, D. Shindo

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

Abstract

The magnetic domain structures of the cubic parent phase (high-temperature phase) in ferromagnetic shape memory alloys (SMAs) have been studied by electron holography. In a Ni51Fe22Ga17 alloy, the magnetic flux distribution in the parent phase changes dramatically before the onset of martensitic transformation. In contrast, a Ni45Co 5Mn36.7In13.3 alloy - a recently developed ferromagnetic SMA - does not show appreciable changes in the magnetic domain structure upon cooling. The anomaly observed in the Ni51Fe 22Ga17 alloy appears to be due to lattice distortions, which become more pronounced as the temperature approaches the martensitic transformation start temperature, Ms.

Original languageEnglish
Title of host publicationMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
PublisherTrans Tech Publications
Pages515-518
Number of pages4
ISBN (Print)0878493786, 9780878493784
Publication statusPublished - 2008 Jan 1
EventMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures - Hong Kong, P.R., China
Duration: 2008 Jul 282008 Jul 31

Publication series

NameAdvanced Materials Research
Volume47-50 PART 1
ISSN (Print)1022-6680

Other

OtherMulti-functional Materials and Structures - International Conference on Multifunctional Materials and Structures
CountryChina
CityHong Kong, P.R.
Period08/7/2808/7/31

Keywords

  • Actuator
  • Electron microscopy
  • Magnetic domain
  • Magnetic flux
  • Martensite
  • Martensitic transformation

ASJC Scopus subject areas

  • Engineering(all)

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