Exchange Biasing Single Molecule Magnets: Coupling of TbPc2 to Antiferromagnetic Layers | Zendy

Alberto Lodi Rizzini | Zendy; Cornelius Krull | Zendy; Timofey Balashov | Zendy; Aitor Mugarza | Zendy; Corneliu Nistor | Zendy; F. Yakhou | Zendy; V. Sessi | Zendy; Svetlana Klyatskaya | Zendy; Mario Ruben | Zendy; Sebastian Stepanow | Zendy; Pietro Gambardella | Zendy

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Exchange Biasing Single Molecule Magnets: Coupling of TbPc₂ to Antiferromagnetic Layers

Author(s) -

Alberto Lodi Rizzini,

Cornelius Krull,

Timofey Balashov,

Aitor Mugarza,

Corneliu Nistor,

F. Yakhou,

V. Sessi,

Svetlana Klyatskaya,

Mario Ruben,

Sebastian Stepanow,

Pietro Gambardella

Publication year - 2012

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/nl302918d

Subject(s) - antiferromagnetism , exchange bias , condensed matter physics , magnetic circular dichroism , spins , magnetization , materials science , paramagnetism , magnetic hysteresis , magnetic anisotropy , biasing , anisotropy , magnetic field , optics , physics , spectral line , quantum mechanics , astronomy , voltage

We investigate the possibility to induce exchange bias between single molecule magnets (SMM) and metallic or oxide antiferromagnetic substrates. Element-resolved X-ray magnetic circular dichroism measurements reveal, respectively, the presence and absence of unidirectional exchange anisotropy for TbPc(2) SMM deposited on antiferromagnetic Mn and CoO layers. TbPc(2) deposited on Mn thin films present magnetic hysteresis and a negative horizontal shift of the Tb magnetization loop after field cooling, consistent with the observation of pinned spins in the Mn layer coupled parallel to the Tb magnetic moment. Conversely, molecules deposited on CoO substrates present paramagnetic magnetization loops with no indication of exchange bias. These experiments demonstrate the ability of SMM to polarize the pinned uncompensated spins of an antiferromagnet during field-cooling and realize metal-organic exchange-biased heterostructures using antiferromagnetic pinning layers.

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