title: Synthesis of Hexagonal FeMnP Thin Films from a Single-Source Molecular Precursor.
abstract: The first heterobimetallic phosphide thin film containing iron, manganese, and phosphorus, derived from the single-source precursor FeMn(CO)8(μ-PH2), has been prepared using a home-built metal-organic chemical vapor deposition apparatus. The thin film contains the same ratio of iron, manganese, and phosphorus as the initial precursor. The film becomes oxidized when deposited on a quartz substrate, whereas the film deposited on an alumina substrate provides a more homogeneous product. Powder X-ray diffraction confirms the formation of a metastable, hexagonal FeMnP phase that was previously only observed at temperatures above 1200 °C. Selected area electron diffraction on single crystals isolated from the films was indexed to the hexagonal phase. The effective moment of the films (μeff=3.68 μB) matches the previously reported theoretical value for the metastable hexagonal phase, whereas the more stable orthorhombic phase is known to be antiferromagnetic. These results not only demonstrate the successful synthesis of a bimetallic, ternary thin film from a single-source precursor, but also the first low temperature approach to the hexagonal phase of FeMnP.
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Andrew P
authors.initials: AP
authors.lastname: Leitner
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Desmond E
authors.initials: DE
authors.lastname: Schipper
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Jing-Han
authors.initials: JH
authors.lastname: Chen
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Adam C
authors.initials: AC
authors.lastname: Colson
authors.affiliation: Texas Center for Superconductivity, University of Houston, 202 UH Science Center, Houston, Texas, 77204-5002, USA.
authors.forename: Irene
authors.initials: I
authors.lastname: Rusakova
authors.affiliation: Department of Physics and Astronomy, Rice University, MS 61, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Binod Kumar
authors.initials: BK
authors.lastname: Rai
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.|Department of Physics and Astronomy, Rice University, MS 61, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Emilia
authors.initials: E
authors.lastname: Morosan
authors.affiliation: Department of Chemistry, Rice University, MS 60, 6100 Main Street, Houston, Texas, 77005-1892, USA.
authors.forename: Kenton H
authors.identifier: http://orcid.org/0000-0001-7362-535X
authors.initials: KH
authors.lastname: Whitmire
keywords: magnetic materials; magnetic properties; pnictides; supported catalysts; thin films; transition metals