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  Study of magnetization reversal in layered heterostructures by vector magnetometry

Markou, A., Mourkas, A., Koume, A., Panagiotopoulos, I., Stoleriu, L., & Stancu, A. (2018). Study of magnetization reversal in layered heterostructures by vector magnetometry. Journal of Magnetism and Magnetic Materials, 445, 95-102. doi:10.1016/j.jmmm.2017.08.084.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-266F-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-2965-A
Genre: Journal Article

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 Creators:
Markou, A.1, Author              
Mourkas, A.2, Author
Koume, A.2, Author
Panagiotopoulos, I.2, Author
Stoleriu, L.2, Author
Stancu, A.2, Author
Affiliations:
1Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
2External Organizations, ou_persistent22              

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 Abstract: Multilayered films consisting of layer stacks with different anisotropies are studied by vector magnetometry i.e. simultaneous measurement of the components Mx, My along and perpendicular to the applied field respectively. The quantity root M-x(2) + M-y(2) is used as measure of the homogeneity of the reversal. For the [Co(6 angstrom)/Pt(15 angstrom)](4)/(Pt(s))/[Co(10 angstrom)/Pt(15 angstrom)](4) with s = 0-45 angstrom series consisting of a perpendicular anisotropy bottom four- bilayer- stack coupled to a planar anisotropy top four- bilayer- stack a peak of the My component is clearly observed at the Mx coercivity. This is a sign of homogeneous reversal but it can be shown that similar effects can arise by decoupling of two layers with different ( in- plane/ perpendicular) anisotropies which is the case for s > 15 angstrom. In order to study the latter effect, a [Co(6 angstrom)/Pt(15 angstrom)](4)/W(15 angstrom)/Co(24 angstrom) sample is used as a reference as it consists of a perpendicular anisotropy bottom four- bilayer- stack coupled to a vanishing anisotropy top Co layer through a W layer ( which creates a magnetically inactive interface permitting only dipolar coupling). In contrast for [Co(5 angstrom)/Pt (10 angstrom)](6)/Pt(s)/[Ni(15 angstrom)/Pt(5 angstrom)](6) series consisting of two different coercivity stacks which both have perpendicular anisotropy the decoupling does not manifest by appearance of peaks in the M-y component. (C) 2017 Published by Elsevier B. V.

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Language(s): eng - English
 Dates: 2018-01-012018-01-01
 Publication Status: Published in print
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 Publishing info: -
 Table of Contents: -
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Title: Journal of Magnetism and Magnetic Materials
  Other : Journal of Magnetism and Magnetic Materials: MMM
  Abbreviation : J. Magn. Magn. Mater.
Source Genre: Journal
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Publ. Info: Amsterdam : NH, Elsevier
Pages: - Volume / Issue: 445 Sequence Number: - Start / End Page: 95 - 102 Identifier: ISSN: 0304-8853
CoNE: /journals/resource/954925512464