dorsal/arxiv
View SchemaNovel structures of Co-Cu bimetallic clusters and their magnetic properties
| Authors | Jinlan Wang, Guanghou Wang, Xiaoshuang Chen, Wei Lu, Jijun Zhao |
|---|---|
| Categories | |
| ArXiv ID | physics/0112075 |
| URL | https://arxiv.org/abs/physics/0112075 |
Abstract
The structural and magnetic properties of Co$_{18-m}$Cu$_m$ ($0\leq m\leq 18$) clusters are investigated with a genetic algorithm and a $spd$-band model Hamiltonian in the unrestricted Hartree-Hock approximation respectively. In general, Cu atoms tend to occupy the surface, while Co atoms prefer to the interior of the clusters. Layered structures appear in some clusters with given stoichiometric compositions. The introduction of Cu atoms leads to large increase of the magnetic moment of Co-rich circumstance and nearly zero magnetism of the Cu-rich ambient. The interaction between Cu and Co atoms induces nonzero magnetic moment for Cu atoms. The total magnetic moments tend to decrease with the increase of Cu atoms. However, some particular large magnetic moment are found to be closely related to the structures. The environment of Cu and Co atoms have a dominant effect on the magnetism of the cluster.
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"abstract": "The structural and magnetic properties of Co$_{18-m}$Cu$_m$ ($0\\leq m\\leq\n18$) clusters are investigated with a genetic algorithm and a $spd$-band model\nHamiltonian in the unrestricted Hartree-Hock approximation respectively. In\ngeneral, Cu atoms tend to occupy the surface, while Co atoms prefer to the\ninterior of the clusters. Layered structures appear in some clusters with given\nstoichiometric compositions. The introduction of Cu atoms leads to large\nincrease of the magnetic moment of Co-rich circumstance and nearly zero\nmagnetism of the Cu-rich ambient. The interaction between Cu and Co atoms\ninduces nonzero magnetic moment for Cu atoms. The total magnetic moments tend\nto decrease with the increase of Cu atoms. However, some particular large\nmagnetic moment are found to be closely related to the structures. The\nenvironment of Cu and Co atoms have a dominant effect on the magnetism of the\ncluster.",
"arxiv_id": "physics/0112075",
"authors": [
"Jinlan Wang",
"Guanghou Wang",
"Xiaoshuang Chen",
"Wei Lu",
"Jijun Zhao"
],
"categories": [
"physics.atm-clus"
],
"title": "Novel structures of Co-Cu bimetallic clusters and their magnetic properties",
"url": "https://arxiv.org/abs/physics/0112075"
},
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