Structural and dynamic properties of the magnetic order in the 90-K superconductor HoBa2Cu3O7
P. Birrer, F. N. Gygax, B. Hitti, E. Lippelt, A. Schenck, M. Weber, S. Barth, F. Hulliger, H. R. Ott
DOI 10.1103/PhysRevB.39.11449 · Physical Review B
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Abstract
Zero-field μ+ spin-rotation measurements in a ceramic sample of HoBa2Cu3O7 reveal three-dimensional antiferromagnetic order below ≈5 K and some incoherent, perhaps two-dimensional, order up to 50 K in a diminishing fraction of the sample volume. With increasing temperature, at about 100 mK, the Ho moments change their orientation from parallel to the c axis to parallel to the a axis. The effective Ho moment is of the order of 2.6μB. Fluctuating field components perpendicular to the static field components at the μ+ positions cause dynamical relaxation coexisting with static dipolar line broadening. Thermally activated slow "paramagnetic" fluctuations are observed up to 50 K.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| HoBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | unknown |
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