DigitalCommons@University of Nebraska - Lincoln - Peter Dowben, A. Yu. Ignatov, Jing Lui, and Ralph Skomski: The local environment of Co in B5CHx

Research Papers in Physics and Astronomy

Peter Dowben Publications

Title

The local environment of Co in B₅CH_x

Authors

Peter Dowben, University of Nebraska - Lincoln
A. Yu. Ignatov, Louisiana State University, Baton Rouge, Louisiana
Jing Lui, University of Nebraska - Lincoln
Ralph Skomski, University of Nebraska-Lincoln

Document Type

Article

Date of this Version

February 2008

Comments

Abstract

Cobalt-doped boron carbides produced by simultaneous plasma-enhanced chemical vapor deposition of carborane and cobaltocene are investigated. Cobalt does not dope plasma-enhanced chemical vapor deposition grown boron carbides as a random fragment of the cobaltocene source gas. The Co atoms are fivefold boron coordinated (R=2.1 Å) and chemically bonded to the icosahedral cages of B₁₀CH_x or B₉C₂H_y. Pairwise Co doping occurs with the cobalt atoms favoring sites about 5.3 Å apart. The cobalt strongly hybridizes with the molecular orbitals of the icosahedral cage, and the states in the region of the band gap probably have a strong cobalt weight.

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