Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-11-24
Physics
Condensed Matter
Strongly Correlated Electrons
Europhyics Letters, in press
Scientific paper
10.1209/epl/i2004-10358-3
We report the response of electrical resistivity $\rho$ to the application of magnetic fields (H) up to 140 kOe in the temperature interval 1.8-300 K for the compound, Gd7Rh3, ordering antiferromagnetically below 150 K. We find that there is an unusually large decrease of $\rho$ 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 $\rho$ is temperature dependent. In addition, this compound exhibits giant magnetoresistance behaviour at rather high temperatures (above 77 K) in the magnetically ordered state due to a metamagnetic transition.
Rayaprol Sudhindra
Sampathkumaran E. V.
Sengupta Kausik
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