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Itinerant Ferromagnetism in layered crystals LaCoOX (X = P, As) by Yanagi, Hiroshi; Kawamura, Ryuto; Kamiya, Toshio; Kamihara, Yoichi; Hirano, Masahiro; Nakamura, Tetsuya; Osawa, Hitoshi; Hosono, Hideo is a scholarly article available to read on EtoBox.

What is Itinerant Ferromagnetism in layered crystals LaCoOX (X = P, As) about?

The electronic and magnetic properties of cobalt-based layered oxypnictides, LaCoOX (X = P, As), are investigated. LaCoOP and LaCoOAs show metallic type conduction, and the Fermi edge is observed by hard x-ray photoelectron spectroscopy. Ferromagnetic transitions occur at 43 K for LaCoOP and 66 K for LaCoOAs. Above the transition temperatures, temperature dependence of the magnetic susceptibility follows the Curie-Weiss law. X-ray magnetic circular dichroism (XMCD) is observed at the Co L2,3-edge, but not at the other edges. The calculated electronic structure shows a spin polarized ground state. These results indicate that LaCoOX are itinerant ferromagnets and suggest that their magnetic properties are governed by spin fluctuation.

Author

Yanagi, Hiroshi; Kawamura, Ryuto; Kamiya, Toshio; Kamihara, Yoichi; Hirano, Masahiro; Nakamura, Tetsuya; Osawa, Hitoshi; Hosono, Hideo

Published

2008

Language

EN