Possible Orbital Ordering Independent of Charge or Magnetic Order in the A-Site Ordered Manganite RBaMn_2O_6 with Structural Frustration(Spin, Orbital, Charge and Lattice Coupled Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin System
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概要
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We have grown single crystals of TbBaMn_2O_6 by a floating-zone method and studied the structural and electromagnetic properties, particularly focusing on the anisotropy of electromagnetic properties. TbBaMn_2O_6 shows successive transitions; the structural transition at 450K, the metal-insulator transition accompanied by the charge/orbital order at 430K and the antiferromagnetic transition at 220K. The obtained results support the d_<x^2-y^2> orbital ordering at 450K which is independent of the charge and magnetic order. This means the separation of orbital, charge and spin degrees of freedom in the A-site ordered manganite RBaMn_2O_6 (R=Tb, Dy, Ho and Y), which might originate in the inherent structural frustration.
- 理論物理学刊行会の論文
- 2005-10-31
著者
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UEDA Yutaka
Material Design and Characterization Laboratory,Institute for Solid State Physics,The University of
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Nakajima Tomohiko
Materials Design And Characterization Laboratory Institute For Solid State Physics University Of Tok
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Nakajima Tomohiko
Materials Design And Characterization Laboratory Institute For Solid State Physics The University Of
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Ueda Yutaka
Materials Design And Characterization Laboratory Institute For Solid State Physics The University Of
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