期刊
PHYSICAL REVIEW B
卷 83, 期 6, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.064417
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资金
- NSF in Santa Barbara [DMR 0909180]
- EPSRC in Liverpool [EP/G065314/1]
- NSF [DMR05-20415]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0909180] Funding Source: National Science Foundation
- Engineering and Physical Sciences Research Council [EP/G065314/1] Funding Source: researchfish
- EPSRC [EP/G065314/1] Funding Source: UKRI
A complete solid solution series between the t(2g)(4) perovskite ferromagnet SrRuO3 and the diamagnetic t(2g)(6) perovskite LaRhO3 has been prepared. The evolution with composition x in (SrRuO3)(1-x) (LaRhO3)(x) of the crystal structure and electrical and magnetic properties has been studied and is reported here. As x increases, the octahedral tilt angle gradually increases, along with the psuedocubic lattice parameter and unit-cell volume. Electrical resistivity measurements reveal a compositionally driven metal-to-insulator transition between x = 0.1 and 0.2. Ferromagnetic ordering gives over to glassy magnetism for x >= 0.3, and no magnetic ordering is found above 2 K for x > 0.5. M-sat and Theta(CW) decrease with increasing x and remain constant after x = 0.5. The magnetism appears poised between localized and itinerant behavior and becomes more localized with increasing x, as evidenced by the evolution of the Rhodes-Wohlfarth ratio. mu(eff) per Ru is equal to the quenched spin-only S value across the entire solid solution. Comparisons with Sr1-xCaxRuO3 reinforce the important role of structural distortions in determining the magnetic ground state. It is suggested that electrical transport and magnetic properties are not strongly coupled in this system.
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