In situ TEM observation of thermally-induced first-order magnetic transition in itinerant-electron metamagnetic La(Fe xSi 1-x) 13 compounds

Naoyuki Kawamoto, Yasukazu Murakami, Daisuke Shindo, Shun Fujieda, Asaya Fujita, Kazuaki Fukamichi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Defocus mode of Lorentz microscopy has revealed change in the magnetic microstructure with a first-order magnetic phase transition in La(Fe xSi 1-x) 13 compounds (0.86 ≤ x. ≤ 0.90). Upon heating specimens from the ferromagnetic phase to the paramagnetic phase, magnetic domains disappear instantaneously at the Curie temperature, concurrent with a substantial change in the volume. The observations are consistent with the feature of the first-order phase transition, which gives rise to extraordinary phenomena of these compounds such as large magnetocaloric effects.

Original languageEnglish
Pages (from-to)1764-1767
Number of pages4
JournalMaterials Transactions
Volume46
Issue number8
DOIs
Publication statusPublished - Aug 1 2005
Externally publishedYes

Fingerprint

Electron transitions
Phase transitions
Magnetocaloric effects
Transmission electron microscopy
Magnetic domains
transmission electron microscopy
Electrons
magnetic domains
Curie temperature
Microscopic examination
electrons
microscopy
Heating
microstructure
Microstructure
heating

All Science Journal Classification (ASJC) codes

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

Cite this

In situ TEM observation of thermally-induced first-order magnetic transition in itinerant-electron metamagnetic La(Fe xSi 1-x) 13 compounds. / Kawamoto, Naoyuki; Murakami, Yasukazu; Shindo, Daisuke; Fujieda, Shun; Fujita, Asaya; Fukamichi, Kazuaki.

In: Materials Transactions, Vol. 46, No. 8, 01.08.2005, p. 1764-1767.

Research output: Contribution to journalArticle

Kawamoto, Naoyuki ; Murakami, Yasukazu ; Shindo, Daisuke ; Fujieda, Shun ; Fujita, Asaya ; Fukamichi, Kazuaki. / In situ TEM observation of thermally-induced first-order magnetic transition in itinerant-electron metamagnetic La(Fe xSi 1-x) 13 compounds. In: Materials Transactions. 2005 ; Vol. 46, No. 8. pp. 1764-1767.
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