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28 March 2024
 
  » arxiv » 1707.5434

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Large Magnetic Anisotropy of an Iron-Porphyrin Complex on Metal Substrate
Bing Liu ; Huixia Fu ; Jiaqi Guan ; Bin Shao ; Sheng Meng ; Jiandong Guo ; Weihua Wang ;
Date 18 Jul 2017
AbstractSingle magnetic atoms or molecules with large single-ion magnetic anisotropy are highly desired for future applications in high-density data storage and quantum computation. Here we have synthesized an Fe-porphyrin complex on Au(111) substrate in a controlled way, and revealed large magnetic anisotropy energy of more than 15 meV by low-temperature scanning tunneling microscopy and spectroscopy. Two magnetic states with opposite spin directions are discriminated by inelastic electron tunneling spectroscopy in varied magnetic field, and are found to have long spin lifetimes. First-principle calculations reveal that the weak ligand filed in this complex keeps the Fe atom in a high-spin state and preserves its large orbital angular momentum, which gives rise to an easy-axis perpendicular to the molecular plane and large magnetic anisotropy energy by spin-orbit coupling.
Source arXiv, 1707.5434
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