Hamburg 2001 – wissenschaftliches Programm

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AM: Magnetismus

AM 9: Poster: Magnetowid. (1-17), Dü. Schichten (18-34), Oberfl
ächenmag. (35,36), Mikr. Methoden (37-45), Mikromag. (46-58), Phasenüberg. (59-77), Spektroskop. (78-91), Nanokr.Mat.(92-96), Anisotrop. (97-101), Schmelzen(102-104),Sonst/postdeadl.(105-109)

AM 9.67: Poster

Dienstag, 27. März 2001, 14:45–19:00, Foyer S 3

Magnetization study of RuSr₂EuCu₂O₈ — •S. Krämer¹ and G. V. M. Williams^1,2 — ¹Universität Stuttgart, 2. Physikalisches Institut, D-70550 Stuttgart — ²The New Zealand Institute for Industrial Research, P.O. Box 31310, Lower Hutt, New Zealand

There have been a number of recent reports of the coexistence of superconductivity and magnetic order in the ruthenate-cuprates. In this contribution we report a magnetization study of RuSr₂EuCu₂O₈. The magnetization data were obtained on a superconducting quantum interference device (SQUID) magnetometer in the temperature range of 5 K to 300 K. The measurements were made on a sintered ceramic sample. We show that the low-field data can be interpreted in terms of antiferromagnetic order with a small ferromagnetic component (0.05 µ_B per Ru at 5 K). However, the high-field data imply a significant ferromagnetic component [1].

[1] G. V. M. Williams and S. Krämer, Phys. Rev. B 62, 4132 (2000).