ISSN:
1572-9540
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract X-ray diffraction, thermogravimetric analysis, magnetization and Mossbauer studies of a57Fe probe, in CaLaBa(Cu1−x Fe x )3O z withz=7, 6.5 andx=0.00 to 0.05 have been performed. Forz=7,T c drops from 74 K forx=0.00 to 35 K forx=0.05. In CaLaBa(Cu1−x Fe x )3O z withz=7, 10% of the iron is magnetically ordered withH eff=530 K kOe andT N=400 K, even though the sample is superconducting. In the oxygen poor, non-superconducting samples (z=6.5) 20% of the iron is magnetically ordered withH eff=340 kOe andT N=340 K. Since the iron reflects the magnetic order of the Cu(2) ions, this may show that perhaps two inequivalent Cu(2) sites exist in CaLaBa(Cu1−x Fe x )3O7, ones of which is magnetically ordered. The experimental observations may be interpreted in terms of the special crystal structure which can allow superconductivity and magnetism to coexist, probably in separate Cu(2) planes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02397148
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