TY - JOUR
T1 - Single-crystal growth and the dependence on hole concentration and magnetic field of the magnetic ground state in the edge-sharing CuO 2 chain system Ca 2+xY 2-xCu 5O 10
AU - Kudo, K.
AU - Kurogi, S.
AU - Koike, Y.
AU - Nishizaki, T.
AU - Kobayashi, N.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2005/3/1
Y1 - 2005/3/1
N2 - We have succeeded in growing large-size single crystals of Ca 2+xY 2-xCu 5O 10 with 0≤x≤ 1.67 and measured the magnetic susceptibility, specific heat, and magnetization curve, in order to study the magnetic ground state in the edge-sharing CuO 2 chain as a function of hole concentration and magnetic field. In the range 0≤x≤ 1.3, it has been found that an antiferromagnetically ordered phase with the magnetic easy axis along the b axis is stabilized and that a spin-flop transition occurs by the application of magnetic fields parallel to the b axis. The antiferromagnetic transition temperature decreases with increasing x and disappears around x=1.4. Alternatively, a spin-glass phase appears around x=1.5. At x=1.67 where the hole concentration is ∼1/3 per Cu, it appears that a spin-gap state is formed owing to the formation of spin-singlet pairs. No sign of the coexistence of an antiferromagnetically ordered state and a spin-gap state as seen in Ca 1-xCuO 2 has been found in Ca 2+xY 2-xCu 5O 10.
AB - We have succeeded in growing large-size single crystals of Ca 2+xY 2-xCu 5O 10 with 0≤x≤ 1.67 and measured the magnetic susceptibility, specific heat, and magnetization curve, in order to study the magnetic ground state in the edge-sharing CuO 2 chain as a function of hole concentration and magnetic field. In the range 0≤x≤ 1.3, it has been found that an antiferromagnetically ordered phase with the magnetic easy axis along the b axis is stabilized and that a spin-flop transition occurs by the application of magnetic fields parallel to the b axis. The antiferromagnetic transition temperature decreases with increasing x and disappears around x=1.4. Alternatively, a spin-glass phase appears around x=1.5. At x=1.67 where the hole concentration is ∼1/3 per Cu, it appears that a spin-gap state is formed owing to the formation of spin-singlet pairs. No sign of the coexistence of an antiferromagnetically ordered state and a spin-gap state as seen in Ca 1-xCuO 2 has been found in Ca 2+xY 2-xCu 5O 10.
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U2 - 10.1103/PhysRevB.71.104413
DO - 10.1103/PhysRevB.71.104413
M3 - Article
AN - SCOPUS:20344392657
SN - 1098-0121
VL - 71
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 104413
ER -