Magnetic spiral structures in La Fe multilayers

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:198-99

Article; Proceedings Paper

Lohstroh, W ; Münzenberg, M ; Felsch, W ; Fritzsche, H ; Maletta, H ; Felcher, GP

关键词: multilayers;    polarized neutron reflectometry;    magneto-optical Kerr effect;   

DOI  :  10.1016/S0304-8853(98)01170-6

来源: Elsevier

【 摘 要 】

The magnetic properties of La/Fe multilayers were tested by magneto-optical Kerr effect and polarized neutron reflectometry. The experiments indicated that above a layer thickness t(La) = 25 Angstrom the magnetic state of the virgin sample is represented by a spiral-like arrangement of magnetizations of subsequent Fe layers, whereas each Fe layer itself is ferromagnetic. Polarized neutron reflectometry shows that the helix has predominantly one chirality over the entire surface area of several cm(2). The magnetic spiral structure is imprinted during the growth process by rotating the sample in a small residual magnetic field. External magnetic field of 90 Oe are sufficient to erase the magnetic structure irreversibly. (C) 1999 Elsevier Science B.V. All rights reserved.

【 授权许可】

Free