Layer resolved magnetization reversal study in SmCo5/Fe nanocomposite bilayers

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

中国物理B ›› 2010, Vol. 19 ›› Issue (3): 37504-037504.doi: 10.1088/1674-1056/19/3/037504

Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers

Z. Hussain², M. Y. Im³, A. Avallone³, P. Fischer³, F. Shahzad⁴, S.A. Siddiqi⁴, F. Hellman⁵

收稿日期:2009-08-16 修回日期:2009-08-18 出版日期:2010-03-15 发布日期:2010-03-15
基金资助:
Project supported by the Higher Education Commission of Pakistan under International Research Support Initiative Program and partially supported by BES/DOE funding.

Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers

F. Shahzad^a)†, S.A. Siddiqi^a), M.Y. Im^b), A. Avallone^b), P. Fischer^b), Z. Hussain^c), I. Siddiqi,^d) and F. Hellman^d)

^aCentre for Solid State Physics, University of the Punjab, Lahore-54590, Pakistan;
^bCenter for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA;
^cAdvanced Light Source, Berkeley Laboratory, University of California, Berkeley, CA-94720, USA;
^dDepartment of Physics, University of California, Berkeley, California-94720, USA

Received:2009-08-16 Revised:2009-08-18 Online:2010-03-15 Published:2010-03-15
Supported by:
Project supported by the Higher Education Commission of Pakistan under International Research Support Initiative Program and partially supported by BES/DOE funding.

摘要/Abstract

摘要： 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.

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.

Key words: multilayers, x-ray microscopes, magnetic properties of nanostructures

中图分类号: (Magnetization reversal mechanisms)

75.60.Jk

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)

. Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers[J]. 中国物理B, 2010, 19(3): 37504-037504.

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[J]. Chin. Phys. B, 2010, 19(3): 37504-037504.

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Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers

Layer resolved magnetization reversal study in SmCo₅/Fe nanocomposite bilayers

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