Magnetic ordering in Fe-doped YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-δ</sub>
Q A Pankhurst; A H Morrish; M Raudsepp; X Z Zhou; Q A Pankhurst; Manitoba Univ., Winnipeg, Man., Canada; A H Morrish; Manitoba Univ., Winnipeg, Man., Canada; M Raudsepp; Manitoba Univ., Winnipeg, Man., Canada; X Z Zhou; Manitoba Univ., Winnipeg, Man., Canada
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1988-01-10
Аннотация:
<sup>57</sup>Fe Mossbauer spectra of a sample of YBa<sub>2</sub>(Cu<sub>0.95</sub>Fe<sub>0.05</sub>)<sub>3</sub>O<sub>7- delta </sub> for which T<sub>c</sub> approximately=57 K show that long-range magnetic order is established below about 12 K. A model in which the Fe and Cu ions are aligned with the crystallographic c-axis provides satisfactory agreement with the observed relaxation spectra. This result is discussed with reference to current theoretical models of high-T<sub>c</sub> superconductivity which invoke magnetic coupling mechanism.
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