TY - JOUR
T1 - Anisotropic spin freezing in the S=1/2 zigzag chain compound SrCuO2
AU - Zaliznyak, I. A.
AU - Broholm, C.
AU - Kibune, M.
AU - Nohara, M.
AU - Takagi, H.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - We characterize an unusual magnetic phase in orthorhombic SrCuO2 using neutron scattering. SrCuO2 contains zigzag spin chains formed by pairs of linear S=1/2 chains (J=180 meV) coupled through a frustrated interaction (|J’| ≲ 0.1J). For T < Tc1=5.0(4) K, an elastic peak develops in a gapless spectrum indicating spin freezing on a time scale δ t > 210-10 s. While the frozen state has long range order along chains (ξc > 200c) and a substantial correlation length, ξa = 60(25)a perpendicular to zigzag planes, the correlation length is only ξb = 2.2(3)b in the direction of frustrated interactions. We argue that slow dynamics of stripelike cooperative magnetic defects yield this anisotropic frozen state.
AB - We characterize an unusual magnetic phase in orthorhombic SrCuO2 using neutron scattering. SrCuO2 contains zigzag spin chains formed by pairs of linear S=1/2 chains (J=180 meV) coupled through a frustrated interaction (|J’| ≲ 0.1J). For T < Tc1=5.0(4) K, an elastic peak develops in a gapless spectrum indicating spin freezing on a time scale δ t > 210-10 s. While the frozen state has long range order along chains (ξc > 200c) and a substantial correlation length, ξa = 60(25)a perpendicular to zigzag planes, the correlation length is only ξb = 2.2(3)b in the direction of frustrated interactions. We argue that slow dynamics of stripelike cooperative magnetic defects yield this anisotropic frozen state.
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U2 - 10.1103/PhysRevLett.83.5370
DO - 10.1103/PhysRevLett.83.5370
M3 - Article
AN - SCOPUS:0001523699
SN - 0031-9007
VL - 83
SP - 5370
EP - 5373
JO - Physical Review Letters
JF - Physical Review Letters
IS - 25
ER -