LARGE POSITIVE MAGNETORESISTANCE AT LOW-TEMPERATURES IN A FERROMAGNETIC NATURAL MULTILAYER, LAMN2GE2

Citation
R. Mallik et al., LARGE POSITIVE MAGNETORESISTANCE AT LOW-TEMPERATURES IN A FERROMAGNETIC NATURAL MULTILAYER, LAMN2GE2, Applied physics letters, 71(16), 1997, pp. 2385-2387
Citations number
25
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00036951
Volume
71
Issue
16
Year of publication
1997
Pages
2385 - 2387
Database
ISI
SICI code
0003-6951(1997)71:16<2385:LPMALI>2.0.ZU;2-L
Abstract
The results of magnetoresistance measurements on a naturally occurring multilayer LaMn2Ge2, which is ferromagnetic below 326 K, are reported . The magnitude of magnetoresistance is found to be positive below 70 K gradually increasing to an unusually large value (nearly 100%) at 4. 2 K in the presence of a field of 70 kOe as the temperature is lowered , similar to the recent observations by Verbanck, Temst, Mae, Schad, V an Bael, Moshchalkov, and Bruynseraede [Appl. Phys. Lett. 70, 1477 (19 97)] in Cr/Ag/Cr trilayers. The positive sign of magnetoresistance for a ferromagnet is unexpected and possible explanations are offered. (C ) 1997 American Institute of Physics.