Hydrostatic pressure effects on the magnetic susceptibility of ruthenium oxide Sr3Ru2O7: evidence for pressure-enhanced antiferromagnetic instability
| Autor: | B.A. deHarak, Gargi Shaw, Gang Cao, Joseph W. Brill, D.K. Powell, Yuri Sushko |
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| Rok vydání: | 2004 |
| Předmět: |
Condensed matter physics
Chemistry Hydrostatic pressure 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Magnetic susceptibility Paramagnetism Magnetization Ferromagnetism Superexchange 0103 physical sciences Materials Chemistry Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Perovskite (structure) |
| Zdroj: | Solid State Communications. 130:341-346 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/j.ssc.2004.02.010 |
| Popis: | Hydrostatic pressure effects on the temperature- and magnetic field dependencies of the in-plane and out-of-plane magnetization of the bi-layered perovskite Sr 3 Ru 2 O 7 have been studied by SQUID magnetometer measurements under a hydrostatic helium-gas pressure. The anomalously enhanced low-temperature value of the paramagnetic susceptibility has been found to systematically decrease with increasing pressure. The effect is accompanied by an increase of the temperature T max of a pronounced peak of susceptibility. Thus, magnetization measurements under hydrostatic pressure reveal that the lattice contraction in the structure of Sr 3 Ru 2 O 7 promotes antiferromagnetism and not ferromagnetism. The effects can be explained by the enhancement of the inter-bi-layer antiferromagnetic spin coupling, driven by the shortening of the superexchange path, and suppression, due to the band-broadening effect, of competing itinerant ferromagnetic correlations. |
| Databáze: | OpenAIRE |
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