Abstract
We have performed detailed magnetization, specific heat and powder X-ray diffraction measurements under magnetic fields, for obtaining information on the magnetic and the structural properties of re-entrant ferromagnet SmMn 2Ge2 with the ThCr2Si2-type tetragonal structure. The lattice parameter a decreases by about 0.1%, while the parameter c increases slightly by about 0.02% in the antiferromagnetic (AFM) state, compared with the ferromagnetic (FM) and re-entrant ferromagnetic (RFM) states. In the AFM state, the structural distortion recovers by applying a magnetic field, accompanied with the metamagnetic transition from the AFM to the forced FM states. The results of a magnetocaloric effect indicate that the magnetic entropy change at these phase transitions is mainly due to the change of the Sm magnetic state.
Original language | English |
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Pages (from-to) | 118-121 |
Number of pages | 4 |
Journal | Journal of Alloys and Compounds |
Volume | 408-412 |
DOIs | |
Publication status | Published - 2006 Feb 9 |
Event | Proceedings of the Rare Earths'04 in Nara, Japan - Duration: 2004 Nov 7 → 2004 Nov 12 |
Keywords
- Magnetic entropy
- Magnetic phase transition
- Powder X-ray diffraction
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry