RED-SHIFT OF ABSORPTION-EDGE AND NONMETAL-METAL TRANSITION IN SINGLE-CRYSTALS LA1-XSRXMNO3 (X = 0.1, 0.2, 0.3)

Authors
LOSHKAREVA NN SUKHORUKOV YP GIZHEVSKII BA SAMOKHVALOV AA ARKHIPOV VE NAISH VE KARABASHEV SG MUKOVSKII YM
Citation
Nn. Loshkareva et al., RED-SHIFT OF ABSORPTION-EDGE AND NONMETAL-METAL TRANSITION IN SINGLE-CRYSTALS LA1-XSRXMNO3 (X = 0.1, 0.2, 0.3), Physica status solidi. a, Applied research, 164(2), 1997, pp. 863-867
Citations number
11
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
164
Issue
2
Year of publication
1997
Pages
863 - 867
Database
ISI
SICI code
0031-8965(1997)164:2<863:ROAANT>2.0.ZU;2-M
Abstract
The red shift of the fundamental absorption edge (approximate to 0.16 eV) of a La0.9Sr0.1MnO3 single crystal occurs as the crystal is cooled into the ferromagnetic phase. This result shows that there exist spin -dependent states. The reflection and absorption spectra of La1-xSrxMn O3 single crystals (x = 0.1, 0.2, 0.3) indicate that the red shift. ma y be the reason for the appearance of free charge carriers participati ng in the colossal magnetoresisttance phenomenon. The nonmetal-metal t ype transition below T-C confirms this.