Phys. Rev. Lett. 81, 3251–3254 (1998)

Magnetization Reversal in Ultrashort Magnetic Field Pulses

Abstract

References

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C. H. Back¹, D. Weller², J. Heidmann³, D. Mauri³, D. Guarisco⁴, E. L. Garwin¹, and H. C. Siegmann⁵
¹Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
²IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120
³IBM Storage Systems Division, 5600 Cottle Road, San Jose, California 95193
⁴Department of Materials Science Engineering, Stanford University, Stanford, California 94305
⁵Laboratorium für Festkörperphysik, ETH Zürich, CH-Zürich, Switzerland

Received 2 September 1997; published in the issue dated 12 October 1998

Strong in-plane magnetic field pulses of 2–4.4 ps duration are used to study magnetization reversal in perpendicularly magnetized Co/Pt films. Ring domains, reminiscent of the field contour during exposure, are observed later with Kerr microscopy. Their radii represent switching fields which are in quantitative agreement with the coherent rotation model. The observation of intrinsic transition broadening is attributed to the existence of static and dynamic fluctuations of the magnetic anisotropy.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.81.3251

DOI:

10.1103/PhysRevLett.81.3251

PACS:

75.70.Cn, 75.10.-b, 75.40.-s

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Phys. Rev. Lett. 81, 3251–3254 (1998)

Magnetization Reversal in Ultrashort Magnetic Field Pulses