Superconductivity and spin correlation study by Fe{sup 3+} - ESR in (La{sub 1-x}Sr{sub x}){sub 2}Cu{sub 1-y}Fe{sub y}O{sub 4-z}
Journal Article
·
· Journal of Low Temperature Physics
- Science Univ. of Tokyo, Noda, Chiba (Japan)
Fe{sup 3+}-ESR measurements are carried out for the samples of (La{sub 1{minus}x}Sr{sub x}){sub 2}Cu{sub 1{minus}y}Fe{sub y}O{sub 4{minus}z}. Peak-peak width {Delta}H{sub pp} of the signals decreases with falling temperature until minimum value and rises sharply with further decreasing temperature, which is approximated by {Delta}H{sub pp} = C{sub 0} + C{sub 1}/T + BT. The {Delta}H{sub pp} behavior at high temperature and at low temperature can be analyzed by Korringa mechanism and slowing down of Fe{sup 3+} spin fluctuation, respectively. From the analysis of coefficient B`s of Korringa terms, C{sub 0} and g-shift it is revealed that the magnetic interaction of Fe{sup 3+} with hole carriers and Cu{sup 2+} spins depends strongly on hole density.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 457202
- Report Number(s):
- CONF-960808--
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 105; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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