ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Magnetic ordering of HoBa2Cu3Ox (x=7.0,6.8,6.3) was investigated by means of neutron diffraction. Long-range antiferromagnetism is found for x=7.0 below TN=190 mK and for x=6.8 below TN=100 mK corresponding to propagation vector K=[0,1/2,1/2] with magnetic moment directions parallel to the a axis. The observed temperature dependence of the magnetic order parameter is in excellent agreement with mean-field calculations taking into account crystal field, exchange, and hyperfine interactions. No magnetic superlattice reflections were detected for x=6.3. A highly unusual ordering behavior is observed in HoBa2Cu3Ox (x=7.0,6.8) where the three-dimensional magnetic ordering is imperfect, due to finite correlation length ξc=29 and 129 A(ring), respectively, along the c axis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.355392
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