Magnetic and magnetotransport properties of GdBaCo2O5+delta: A high magnetic-field study - art. no. 214401

Authors
Respaud, M Frontera, C Garcia-Munoz, JL Aranda, MAG Raquet, B Broto, JM Rakoto, H Goiran, M Llobet, A Rodriguez-Carvajal, J
Citation
M. Respaud et al., Magnetic and magnetotransport properties of GdBaCo2O5+delta: A high magnetic-field study - art. no. 214401, PHYS REV B, 6421(21), 2001, pp. 4401
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6421
Issue
21
Year of publication
2001
Database
ISI
SICI code
0163-1829(200112)6421:21<4401:MAMPOG>2.0.ZU;2-V
Abstract
Magnetic, transport. and optical measurements performed on GdBaCo2O5.5 unde r pulsed magnetic fields up to 35 T have allowed us to determine its comple te mu H-o-T phase diagram. A first-order field-induced transition takes pla ce below the Neel point (T(N)approximate to 255 K) which implies the appear ance of a ferromagnetic component and steep changes in the conductivity. Th e ferromagnetic component (0.45+/-0.1) mu (B)/(Co ion) does not appreciably change below T-N. The nature of the high-field ferromagnetic state is disc ussed in connection with the zero-field ferromagnetic (or ferrimagnetic) ph ase above T-N.