Magnetic Structures of High Temperature Phases of TbBaCo2O5.5

Abstract

Neutron diffraction studies have been carried out on a single crystal of oxygen-deficient perovskite TbBaCo2O5.5 in the temperature range of 7-370 K. There have been observed several magnetic or structural transitions. Among these, the existence of the transitions to the insulating phase from the metallic one at ~340 K, to the one with the ferromagnetic moment at ~280 K and possibly to the antiferromagnetic one at ~260 K, with decreasing temperature T correspond to those reported in former works. We have studied the magnetic structures at 270 K and 250 K and found that all Co3+ ions of the CoO6 octahedra are in the low spin state and those of the CoO5 pyramids carry spins which are possibly in the intermediate spin state. Non-collinear magnetic structures are proposed at these temperatures. Two other transitions have also been observed at the temperatures, ~100 K and ~250 K.

arXiv comment9 pages, 2 tables, 10 figures

References in corpus (1)

• Selective Spin-State Switch and Metal-Insulator Transition in \boldmath $\mathrm{GdBaC}{\mathrm{o}}_2{\mathrm{O}}_{5.5}$

Cited by in corpus (22)

• Transport and magnetic properties of GdBaCo_{2}O_{5+x} single crystals: A cobalt oxide with square-lattice CoO_2 planes over a wide range of electron and hole doping
• A different look at the spin state of Co${}^{3+}$ ions in CoO${}_5$ pyramidal coordination
• Spin structure and magnetic phase transitions in TbBaCo2O5.5
• Magnetic Correlation of NaxCoO2 and Successive Phase Transitions of Na0.5CoO2 -NMR and Neutron Diffraction Studies-
• Transport and Magnetic Studies on the Spin State Transition of Pr1-xCaxCoO3 up to High Pressure
• Magnetic Structure of YBaCo4O7 with Kagome- and Triangular-Lattices
• Microscopic Evidence of Spin State Order and Spin State Phase Separation in Layered Cobaltites RBaCo2O5.5 with R=Y, Tb, Dy, and Ho
• 59Co-NMR Knight Shift of Aligned Crystals and Polycrystalline Samples of Superconducting Na0.3CoO2.1.3H2O
• X-ray Diffraction Study of Superstructure in GdBaCo2O5.5
• On the Mechanism of the Spin State Transition of (Pr1-ySmy)1-xCaxCoO3
• Magnetic Structures and Spin States of NdBaCo2O5
• Hole-doping-induced melting of spin-state ordering in PrBaCo2O5.5+x
• Effect of Oxygen Content on Magnetic Properties of Layered Cobaltites PrBaCo2O5+δ
• Magnetic properties of superconducting cobalt oxides NaxCoO2.yH2O
• Magnetic and Metal-Insulator Transitions in beta-Na0.5CoO2 and gamma-K0.5CoO2 -NMR and Neutron Diffraction Studies-
• Probing phase coexistence and stabilization of the spin-ordered ferrimagnetic state by Calcium addition in the YBa_{1-x}Ca_{x}Co_{2}O_{5.5} layered cobaltites using neutron diffraction
• Existence of the Co3+ Low Spin State in TbBaCo2O5.5
• Oxygen Isotope Effect on the Spin State Transition in (Pr${}_{0.7}$Sm${}_{0.3}$)${}_{0.7}$Ca${}_{0.3}$CoO${}_3$
• Magnetic and Electronic properties of Eu0.9Ca0.1BaCo2O5.5+? with the disparity of Oxygen Stoichiometry
• Infra-red Spectroscopic Studies of GdBaCo2O5.5
• Anomalous Hall Resistivity of TbBaCo2O5.53 with Non-trivial Magnetic Structure
• 59Co-NMR Knight Shift of Superconducting Three-Layer NaxCoO2.yH2O