SrFeO2.95: A helical antiferromagnet with large magnetoresistance - art. no. 024414

Authors
Zhao, YM Mahendiran, R Nguyen, N Raveau, B Yao, RH
Citation
Ym. Zhao et al., SrFeO2.95: A helical antiferromagnet with large magnetoresistance - art. no. 024414, PHYS REV B, 6402(2), 2001, pp. 4414
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6402
Issue
2
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010701)6402:2<4414:SAHAWL>2.0.ZU;2-F
Abstract
Resistivity, magnetoresistance, and Mossbauer effect of metallic spiral ant iferromagnet SrFeO2.95 have been examined in the temperature range 4.5-300 K. A large negative magnetoresistance below 50 K is observed. We find hyste resis in resistivity in 0 and 9 T due to the coexistence of antiferromagnet ic and paramagnetic domains in the temperature region 50-80 K. Our result s hows two contributions to magnetoresistance: one below 50 K that is due to helical-conical spin transformation and another close to TN that is due to reduced spin fluctuation under magnetic field.