Citation
Ev. Sampathkumaran et al., Unusually large negative magnetoresistance around 200 K in the alloys Gd1-xLaxMn2Ge2, J PHYS-COND, 12(25), 2000, pp. L399-L403
Citations number
27
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
09538984
→ ACNP
Volume
12
Issue
25
Year of publication
2000
Pages
L399 - L403
Database
ISI
SICI code
0953-8984(20000626)12:25<L399:ULNMA2>2.0.ZU;2-6
Abstract
We report here the observation of large negative magnetoresistance (MR) at
200 K (for instance, about -5.5% for the application of a magnetic field of
70 kOe) in magnetic alloys, Gd1-xLaxMn2Ge2 (x = 0.07 and 0.08). There is a
distinct sign reversal of MR, with a comparable magnitude, for x = 0.07 at
123 K thereby establishing the presence of temperature dependent magnetic
structures. The observation of a large MR at temperatures as high as 200 K
is uncommon among the bulk form of alloys.