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

doi:10.2320/matertrans.46.1764

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 journal › Article › peer-review

5 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 language	English
Pages (from-to)	1764-1767
Number of pages	4
Journal	Materials Transactions
Volume	46
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.46.1764
Publication status	Published - 2005 Aug

Keywords

First-order transition
Itinerant-electron metamagnetic transition
Lorentz microscopy
Magnetic domain
Magnetocaloric effect
Magnetovolume effect
Transmission electron microscopy

ASJC Scopus subject areas

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

Access to Document

10.2320/matertrans.46.1764

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, 08.2005, p. 1764-1767.

Research output: Contribution to journal › Article › peer-review

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