Magnetic-field and temperature dependencies of the electrical resistance near the magnetic and crystallographic first-order phase transition of
- 15 September 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 60 (11), 7993-7997
- https://doi.org/10.1103/physrevb.60.7993
Abstract
The magnetic field (0 to 4 T) and temperature (5 to 320 K) dependencies of the electrical resistance of have been measured. Upon heating in zero-magnetic field undergoes a simultaneous magnetic and crystallographic phase transition at about 276 K. The electrical resistance of changes drastically and has significant temperature and magnetic-field hystereses. The magnetoresistance has a negative peak of -26% between 274 and 295 K in a 4 T magnetic field, which is associated with the transition from the low-temperature, low-resistance ferromagnetic orthorhombic to the high-temperature, high-resistance paramagnetic monoclinic phase. The increase of the total resistance upon transformation from the magnetically ordered orthorhombic to magnetically disordered monoclinic phase correlates with the differences between the two crystallographic modifications of The behavior of the electrical resistance as a function of magnetic field between 262 and 282 K shows the presence of temperature-dependent critical magnetic fields, which can reversibly transform both the magnetic and crystal structures of the material. The magnetic phase diagram obtained from the magnetic-field and temperature dependencies of the electrical resistance of is proposed.
Keywords
This publication has 9 references indexed in Scilit:
- Giant magnetoresistance near the magnetostructural transition in Gd5(Si1.8Ge2.2)Applied Physics Letters, 1998
- Magnetic-field-induced structural phase transition inPhysical Review B, 1998
- Phase relationships and crystallography in the pseudobinary system Gd5Si4Gd5Ge4Journal of Alloys and Compounds, 1997
- Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ∼20 to ∼290 KApplied Physics Letters, 1997
- Giant Magnetocaloric Effect inPhysical Review Letters, 1997
- Giant galvanomagnetic effects in intermediate valence systems with magnetic orderPhysica B: Condensed Matter, 1997
- Giant magnetoresistance effects in intermetallic compounds (invited)Journal of Applied Physics, 1994
- Theory of the negative magnetoresistance of ferromagnetic-normal metallic multilayers (invited)Journal of Applied Physics, 1994
- Magnetoresistance in actinide and lanthanide intermetallicsJournal of Alloys and Compounds, 1994