Unconventional magnetisation texture in graphene/cobalt hybrids

Vu, A. D.; Coraux, J.; Chen, G.; N’Diaye, A. T.; Schmid, A. K.; Rougemaille, N.

doi:10.1038/srep24783

Title: Unconventional magnetisation texture in graphene/cobalt hybrids

Journal Article · Tue Apr 26 00:00:00 EDT 2016 · Scientific Reports

DOI:https://doi.org/10.1038/srep24783· OSTI ID:1379301

Vu, A. D. ^[1]; Coraux, J. ^[1]; Chen, G. ^[2]; N’Diaye, A. T. ^[3]; Schmid, A. K. ^[2]; Rougemaille, N. ^[1]

Scientific Research National Center (CNRS), Grenoble (France); Univ. of Grenoble (France)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Molecular Foundry
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source

Magnetic domain structure and spin-dependent reflectivity measurements on cobalt thin films intercalated at the graphene/Ir(111) interface are investigated using spin-polarised low-energy electron microscopy. We find that graphene-covered cobalt films have surprising magnetic properties. Vectorial imaging of magnetic domains reveals an unusually gradual thickness-dependent spin reorientation transition, in which magnetisation rotates from out-of-the-film plane to the in-plane direction by less than 10° per cobalt monolayer. During this transition, cobalt films have a meandering spin texture, characterised by a complex, three-dimensional, wavy magnetisation pattern. In addition, spectroscopy measurements suggest that the electronic band structure of the unoccupied states is essentially spin-independent already a few electron-Volts above the vacuum level. These properties strikingly differ from those of pristine cobalt films and could open new prospects in surface magnetism.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1379301

Journal Information:: Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 33 works

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Title: Unconventional magnetisation texture in graphene/cobalt hybrids

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