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  Coupling dependent reversal in Co/Pt based mixed anisotropy multilayer stacks

Markou, A., Panagiotopoulos, I., Stoleriu, L., Stancu, A., & Ott, F. (2019). Coupling dependent reversal in Co/Pt based mixed anisotropy multilayer stacks. Journal of Magnetism and Magnetic Materials, 485, 205-211. doi:10.1016/j.jmmm.2019.04.080.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-D356-E Version Permalink: http://hdl.handle.net/21.11116/0000-0003-D358-C
Genre: Journal Article

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 Creators:
Markou, A.1, Author              
Panagiotopoulos, I2, Author
Stoleriu, L.2, Author
Stancu, A.2, Author
Ott, F.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: A series of multilayers [Co(6)/Pt(15)](4)/(Pt(s))/[Co(10)/Pt(15)](4) (thicknesses in angstrom) consisting from a perpendicular magnetic anisotropy [Co(6)/Pt(15)](4)-stack (PA) coupled to an in-plane anisotropy [Co(10)/Pt(15)](4)-stack (IPA) through the variable Pt interlayer (with s = 0-45 angstrom), is studied as a model mixed-anisotropy system. Vector vibrating sample magnetometry and polarized neutron reflectometry show that, at remanence, the magnetization of each stack relaxes to its own easy axis, with the exception of the s = 0. For the s = 0 sample, the strong coupling between the two different anisotropy stacks results in a collective reversal of both stacks. This process corresponds to an averaged effective uniaxial anisotropy, which suppresses the PA characteristics. For the rest of the samples the stacks are weakly coupled and separate reversal of the two stacks occurs. The PA stack reverses by rapid domain wall motion under the influence of the IPA which has relaxed to its own easy plane. The remaining coupling, despite being weak, influences the values and angular dependence of the reversal fields as well as the positions of positive/negative and doublets on the First Order Reversal Curve (FORC) distributions.

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Language(s): eng - English
 Dates: 2019-04-222019-04-22
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1016/j.jmmm.2019.04.080
 Degree: -

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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: 485 Sequence Number: - Start / End Page: 205 - 211 Identifier: ISSN: 0304-8853
CoNE: https://pure.mpg.de/cone/journals/resource/954925512464