Magnetic interactions of vanadyl phthalocyanine with ferromagnetic iron, cobalt, and nickel surfaces
Magnetic interactions of vanadyl phthalocyanine with ferromagnetic iron, cobalt, and nickel surfaces
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DOI：
10.1021/jp503851k
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发表时间：
2014-07
影响因子：
3.7
通讯作者：
K. Eguchi;Y. Takagi;T. Nakagawa;T. Yokoyama
中科院分区：
文献类型：
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作者：
K. Eguchi;Y. Takagi;T. Nakagawa;T. Yokoyama
我们利用x射线吸收光谱和x射线磁圆二色性研究了在Cu（001）表面外延生长的铁、钴和镍铁磁性薄膜上沉积的钒基酞菁（VOPc）的分子取向和磁性。结果表明，VOPc框架平躺在氧合结构的表面上。VOPc中中心V原子的自旋与铁磁表面的Fe或Co原子的自旋是反铁磁耦合的。相反，V和Ni之间的磁耦合不有效，表现为VOPc的简单顺磁性。
We have investigated the molecular orientation and magnetic properties of vanadyl phthalocyanine (VOPc) deposited on ferromagnetic Fe, Co, and Ni films, which were epitaxially grown on Cu(001) using X-ray absorption spectroscopy and X-ray magnetic circular dichroism. The results reveal that the VOPc framework lies flat on the surfaces with oxygen-up configurations. The spin of the central V atoms in VOPc is antiferromagnetically coupled with those of Fe or Co atoms in the ferromagnetic surface. In contrast, the magnetic coupling between V and Ni is not effective, exhibiting simple paramagnetism of VOPc.