Document Detail


Exchange biasing single molecule magnets: coupling of TbPc(2) to antiferromagnetic layers.
MedLine Citation:
PMID:  23046484     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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.
Authors:
Alberto Lodi Rizzini; Cornelius Krull; Timofey Balashov; Aitor Mugarza; Corneliu Nistor; Flora Yakhou; Violetta Sessi; Svetlana Klyatskaya; Mario Ruben; Sebastian Stepanow; Pietro Gambardella
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-9
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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