| Issue |
Europhys. Lett.
Volume 69, Number 3, February 2005
|
|
|---|---|---|
| Page(s) | 454 - 460 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10358-3 | |
| Published online | 24 December 2004 | |
Large magnetoresistance in the magnetically ordered state
as well as in the paramagnetic state near 
in an intermetallic compound, 
Tata Institute of Fundamental Research - Homi Bhabha Road Colaba, Mumbai-400005, India
Received:
12
October
2004
Accepted:
22
November
2004
We report the response of electrical resistivity ρ to the
application of magnetic fields (H) up to 140
in the
temperature interval 1.8–300 for the compound
, ordering antiferromagnetically below
150. We find that there is an unusually large decrease of
ρ for moderate values of H in the close vicinity of room
temperature, uncharacteristic of paramagnets, with the magnitude
of the magnetoresistance increasing with decreasing temperature
as though the spin-order contribution to ρ were temperature
dependent. In addition, this compound exhibits
giant-magnetoresistance behaviour at rather high temperatures
(above 77) in the magnetically ordered state due to a
metamagnetic transition.
PACS: 75.47.De – Giant magnetoresistance / 72.15.-v – Electronic conduction in metals and alloys / 75.50.-y – Studies of specific magnetic materials
© EDP Sciences, 2005
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