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MAGNETIC MOSSBAUER-SPECTRA OBSERVED IN SUPERCONDUCTING SAMPLES OF YBA2(CU1-XFEX)3O6.5+P

SUHARAN, S; JOHNSON, CE; PANKHURST, QA; THOMAS, MF; (1992) MAGNETIC MOSSBAUER-SPECTRA OBSERVED IN SUPERCONDUCTING SAMPLES OF YBA2(CU1-XFEX)3O6.5+P. In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. (pp. 879 - 880). ELSEVIER SCIENCE BV

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Abstract

Magnetic Mossbauer spectra have been observed at low temperature for samples of YBa2(Cu1-xFex)3O6.5 + p with Fe levels x = 0.01, 0.02, 0.04, 0.10 and 0.20. Fits to these complex magnetic spectra were constrained by simultaneous fitting of low temperature magnetic and high temperature nonmagnetic spectra of the same sample. The fits revealed two magnetic components, an Fe3+ magnetic sextet most prominent at x = 0.20 and, for smaller values of x, a complex component whose fitting required a distribution of magnetic hyperfine fields. The temperature dependence of the hyperfine fields of this latter component gave values of T(hf) where the magnetic hyperfine field appears.

Type: Proceedings paper
Title: MAGNETIC MOSSBAUER-SPECTRA OBSERVED IN SUPERCONDUCTING SAMPLES OF YBA2(CU1-XFEX)3O6.5+P
Event: INTERNATIONAL CONF ON MAGNETISM
Location: EDINBURGH, SCOTLAND
Dates: 1991-09-02 - 1991-09-06
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/59410
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