2016
DOI: 10.1021/acs.inorgchem.6b01484
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Coupled Electronic and Magnetic Phase Transition in the Infinite-Layer Phase LaSrNiRuO4

Abstract: Topochemical reduction of the ordered double perovskite LaSrNiRuO6 with CaH2 yields LaSrNiRuO4, an extended oxide phase containing infinite sheets of apex-linked, square-planar Ni(1+)O4 and Ru(2+)O4 units ordered in a checkerboard arrangement. At room temperature the localized Ni(1+) (d(9), S = (1)/2) and Ru(2+) (d(6), S = 1) centers behave paramagnetically. However, on cooling below 250 K the system undergoes a cooperative phase transition in which the nickel spins align ferromagnetically, while the ruthenium… Show more

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Cited by 24 publications
(61 citation statements)
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“…As a result, a special spin-orbital state associated with the unusual charge state could offer a remarkable property. In line with this expectation there appears a layered ferromagnetic (FM) insulator LaSrNiRuO 4 , which has an unusual low-valence Ni + /Ru 2+ state and a quite high Curie temperature of about 200 K [15].LaSrNiRuO 4 has a square planar NiO 2 -RuO 2 layer where the Ni and Ru atoms are checkerboard ordered, see fig. 1.…”
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confidence: 57%
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“…As a result, a special spin-orbital state associated with the unusual charge state could offer a remarkable property. In line with this expectation there appears a layered ferromagnetic (FM) insulator LaSrNiRuO 4 , which has an unusual low-valence Ni + /Ru 2+ state and a quite high Curie temperature of about 200 K [15].LaSrNiRuO 4 has a square planar NiO 2 -RuO 2 layer where the Ni and Ru atoms are checkerboard ordered, see fig. 1.…”
mentioning
confidence: 57%
“…• at 300 K [15]. As seen below, two sets of results differ insignificantly and arrive at the same conclusions, and, therefore, our discussion will focus on the results based on the structural data measured at 5 K. Moreover, using the magnetic exchange parameters estimated from those density functional calculations, we also carried out Monte Carlo simulations for the NiRu magnetic sublattices, and the simulation details and results will be seen below.…”
Section: +mentioning
confidence: 89%
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