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 |
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Pages (from-to) | 1764-1767 |
Number of pages | 4 |
Journal | Materials Transactions |
Volume | 46 |
Issue number | 8 |
DOIs | |
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