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Magnetic Interactions of Dilute F Ions Implanted into CuO and High-Tc Materials

S. N. Mishra1, D. Riegel1, L. Büermann1, K. D. Gross1, Th. Kornrumpf1, M. Luszik-Bhadra1, H. General2, H. Schmidt2 and E. Zirngiebl2

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We have explored the applicability of the perturbed γ-ray distribution method following heavy-ion reactions for microscopic investigations of magnetic properties of CuO and high-Tc materials. The spin rotation of dilute 18F and 19F ions recoil implanted into CuO is consistent with the onset of antiferromagnetic ordering at 225 K and with dynamic antiferromagnetic correlations above 225 K. The magnetic response of F ions in YBa2Cu3O ~ 7 and La1.85Sr0.15CuO4 yields negligible frequency shifts and no measurable indication of antiferromagnetic order.


PACS

76.60.-k Nuclear magnetic resonance and relaxation

75.30.-m Intrinsic properties of magnetically ordered materials

74.70.-b Superconducting materials

Subjects

Superconductivity

Condensed matter: electrical, magnetic and optical

Dates

Issue 2 (15 September 1988)

Received 5 May 1988



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