Enhanced Spin Tunneling in a Molecular Magnet Mixed with a Superconductor

  • J. Tejada
  • R. Zarzuela
  • A. García-Santiago
  • I. Imaz
  • J. Espin
  • D. Maspoch
  • E. M. Chudnovsky


We report characterization and magnetic studies of mixtures of micrometer-size ribbons of Mn12 acetate and micrometer-size particles of YBaCuO superconductor. Extremely narrow zero-field spin-tunneling resonance has been observed in the mixtures, pointing to the absence of the inhomogeneous dipolar broadening. It is attributed to the screening of the internal magnetic fields in the magnetic particles by Meissner currents flowing between superconducting grains surrounding the particles.


Spin tunneling Molecular magnet Superconductor 



The work at the University of Barcelona has been supported by the Spanish Government Project No. MAT2011-23698. I.I. and J.E. thank the MINECO for the Ramón y Cajal contract and the FPI fellowship, respectively. The work of EMC at CUNY Lehman College has been supported by the Office of Science of the U.S. Department of Energy through grant No. DE-FG02-93ER45487.


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© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Departament de Física Fonamental, Facultat de FísicaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Institut Català de Nanotecnologia, ICN2Esfera Universitat Autònoma Barcelona (UAB)BellaterraSpain
  3. 3.Institució Catalana de Recerca i Estudis Avançats (ICREA)BarcelonaSpain
  4. 4.Physics Department, Lehman CollegeThe City University of New YorkNew YorkUSA

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