Abstract
In order to gain insights into the origin of colossal magnetoresistance (CMR) in manganese oxides, we performed a La139 NMR study in the double-layered compound La1.2Sr1.8Mn2O7. We find that above the Curie temperature TC=126K, applying a magnetic field induces a long-range ferromagnetic order that persists up to T=330K. The critical field at which the induced magnetic moment is saturated coincides with the field at which the CMR effect reaches a maximum. Our results therefore indicate that the CMR observed above TC in this compound is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.
| Original language | English |
|---|---|
| Article number | 057203 |
| Journal | Physical Review Letters |
| Volume | 96 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2006 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Field-induced ferromagnetic order and colossal magnetoresistance in La1.2Sr1.8Mn2O7 : A La139 NMR study. / Shiotani, Y.; Sarrao, J. L.; Zheng, Guo-Qing.
In: Physical Review Letters, Vol. 96, No. 5, 057203, 2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Field-induced ferromagnetic order and colossal magnetoresistance in La1.2Sr1.8Mn2O7
T2 - A La139 NMR study
AU - Shiotani, Y.
AU - Sarrao, J. L.
AU - Zheng, Guo-Qing
PY - 2006
Y1 - 2006
N2 - In order to gain insights into the origin of colossal magnetoresistance (CMR) in manganese oxides, we performed a La139 NMR study in the double-layered compound La1.2Sr1.8Mn2O7. We find that above the Curie temperature TC=126K, applying a magnetic field induces a long-range ferromagnetic order that persists up to T=330K. The critical field at which the induced magnetic moment is saturated coincides with the field at which the CMR effect reaches a maximum. Our results therefore indicate that the CMR observed above TC in this compound is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.
AB - In order to gain insights into the origin of colossal magnetoresistance (CMR) in manganese oxides, we performed a La139 NMR study in the double-layered compound La1.2Sr1.8Mn2O7. We find that above the Curie temperature TC=126K, applying a magnetic field induces a long-range ferromagnetic order that persists up to T=330K. The critical field at which the induced magnetic moment is saturated coincides with the field at which the CMR effect reaches a maximum. Our results therefore indicate that the CMR observed above TC in this compound is due to the field-induced ferromagnetism that produces a metallic state via the double exchange interaction.
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U2 - 10.1103/PhysRevLett.96.057203
DO - 10.1103/PhysRevLett.96.057203
M3 - Article
VL - 96
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 5
M1 - 057203
ER -