Abstract
We performed the powder X-ray diffraction measurements in magnetic fields up to 5 T for Gd5(Ge1.95Fe0.05)Si2 and Gd5(Ge1.8Fe0.2)Si2. With heating from 8 K, the matrix of Gd5(Ge1.95Fe0.05) Si2 clearly shows a structural transition from an orthorhombic to a monoclinic structure at the Curie temperature (TC = 276 K). On the other hand, the matrix of Gd5(Ge1.8Fe0.2) Si2 with the orthorhombic structure in the ferromagnetic state shows two-phases co-existence of the orthorhombic and the monoclinic structures above TC = 303 K, indicating that a small amount of the matrix participates in the transformation. For both samples, the monoclinic structure is suppressed but the orthorhombic structure is enhanced just above TC by applying a magnetic field, which closely relates to the magnetization process.
Original language | English |
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Pages (from-to) | 2011-2014 |
Number of pages | 4 |
Journal | Materials Transactions |
Volume | 46 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2005 Sep |
Keywords
- Field-induced structural transformation
- GdGeSi compound
- High field X-ray diffraction
- Magnetic refrigeration materials
- Meta magnetic transition
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering