Onset of metallic ferromagnetism in a doped spin–orbital chain
Maria Daghofer, Andrzej M. Oleś, Wolfgang von der Linden
Abstract
Open-access reader
Maria Daghofer, Andrzej M. Oleś, Wolfgang von der Linden
Abstract
Open-access reader
Abstract Starting from a spin–orbital model for doped manganites, we investigate a competition between ferromagnetic and antiferromagnetic order in a one‐dimensional model at finite temperature. The magnetic and orbital order at half filling support each other and depend on a small antiferromagnetic superexchange between t2g spins and on an alternating Jahn–Teller potential. The crossover to a metallic ferromagnetic phase found at finite doping is partly suppressed by the Jahn–Teller potential which may localize eg electrons. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Abstract Starting from a spin–orbital model for doped manganites, we investigate a competition between ferromagnetic and antiferromagnetic order in a one‐dimensional model at finite temperature. The magnetic and orbital order at half filling support each other and depend on a small antiferromagnetic superexchange between t2g spins and on an alternating Jahn–Teller potential. The crossover to a metallic ferromagnetic phase found at finite doping is partly suppressed by the Jahn–Teller potential which may localize eg electrons. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Key concepts: Superexchange, Antiferromagnetism, Condensed matter physics, Ferromagnetism, Spins, Jahn–Teller effect, Doping, Spin (aerodynamics)