Layer resolved magnetization reversal study in SmCo5/Fe nanocomposite bilayers

doi:10.1088/1674-1056/19/3/037504

Abstract A hard/soft SmCo₅/ Fe nanocomposite magnetic bilayer system is fabricated on x-ray transparent 100--200 nm thin Si₃N₄ films by magnetron sputtering. The microscopic magnetic domain pattern and its behaviours during magnetization reversal in the hard and the soft magnetic phases are studied separately by element specific magnetic soft x-ray microscopy at a spatial resolution of better than 25 nm. We observe that the domain patterns for the soft and hard phases show coherent behaviours in varying magnetic fields. We derive local M(H) curves from the images of Fe and SmCo₅ separately and find the switches for hard and soft phases to be the same.

Keywords: multilayers x-ray microscopes magnetic properties of nanostructures

Received: 16 August 2009
Revised: 18 August 2009
Accepted manuscript online:

PACS:	75.60.Jk	(Magnetization reversal mechanisms)
	75.75.+a
	75.60.Ch	(Domain walls and domain structure)
	75.70.Kw	(Domain structure (including magnetic bubbles and vortices))
	68.37.Yz	(X-ray microscopy)
	75.70.Ak	(Magnetic properties of monolayers and thin films)

Fund: Project supported by the Higher Education Commission of Pakistan under International Research Support Initiative Program and partially supported by BES/DOE funding.

Cite this article:

F. Shahzad, S.A. Siddiqi, M.Y. Im, A. Avallone, P. Fischer, Z. Hussain, I. Siddiqi, and F. Hellman Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers 2010 Chin. Phys. B 19 037504

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Layer resolved magnetization reversal study in SmCo5/Fe nanocomposite bilayers

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Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers