Adsorption-induced switching of magnetic anisotropy in a single iron(II) phthalocyanine molecule on an oxidized Cu(110) surface

Noriyuki Tsukahara, Ken Ichi Noto, Michiaki Ohara, Susumu Shiraki, Noriaki Takagi, Yasutaka Takata, Jun Miyawaki, Munetaka Taguchi, Ashish Chainani, Shik Shin, Maki Kawai

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207 Citations (Scopus)

Abstract

We examined the zero-field splitting of an iron(II) phthalocyanine (FePc) attached to clean and oxidized Cu(110) surfaces and the dependence on an applied magnetic field by inelastic electron tunneling spectroscopy with STM. The symmetry of the ligand field surrounding the Fe atom is lowered on the oxidized surface, switching the magnetic anisotropy from the easy plane of the bulk to the easy axis. The zero-field splitting was not observed for FePc on a clean Cu(110) surface, and the spin state converts from triplet to singlet due to the strong coupling of Fe d states with the Cu substrate, as is also confirmed by photoelectron spectroscopy. These findings demonstrate the importance of coupling at the molecule-substrate interface for manipulating the magnetic properties of adsorbates.

Original languageEnglish
Article number167203
JournalPhysical review letters
Volume102
Issue number16
DOIs
Publication statusPublished - 2009 Apr 23

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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