INTRINSIC GIANT MAGNETORESISTANCE OF MIXED-VALENCE LA-A-MN OXIDE (A=CA,SR,BA) (INVITED)

Authors
VONHELMOLT R WECKER J SAMWER K HAUPT L BARNER K
Citation
R. Vonhelmolt et al., INTRINSIC GIANT MAGNETORESISTANCE OF MIXED-VALENCE LA-A-MN OXIDE (A=CA,SR,BA) (INVITED), Journal of applied physics, 76(10), 1994, pp. 6925-6928
Citations number
27
Categorie Soggetti
Physics, Applied
Journal title
Journal of applied physics → ACNP
ISSN journal
00218979
Volume
76
Issue
10
Year of publication
1994
Part
2
Pages
6925 - 6928
Database
ISI
SICI code
0021-8979(1994)76:10<6925:IGMOML>2.0.ZU;2-5
Abstract
A large intrinsic magnetoresistance has been found near the ferromagne tic transition of metallic manganese oxides with perovskite-type cryst al structure. The magnetic and transport properties were measured on b ulk and thin-film La(1-x)A(x)MnO(3+delta) with A=Ca,Sr,Ba. Assuming th e double-exchange model proposed by Zener [Phys. Rev. 81, 440 (1951); 82, 403 (1951)], the strong dependence of the transport properties on the magnetic field and also on the chemical composition is attributed to the mixed Mn3+/Mn4+ valence.