Skip to main content

Research Repository

Advanced Search

All Outputs (10)

Crystal field excitations and magnons: Their roles in oxyselenides Pr2O2M2OSe2 (M = Mn, Fe) (2017)
Journal Article
Oogarah, R., Stockdale, C., Stock, C., Evans, J., Wills, A., Taylor, J., & McCabe, E. (2017). Crystal field excitations and magnons: Their roles in oxyselenides Pr2O2M2OSe2 (M = Mn, Fe). Physical Review B, 95(17), Article 174441. https://doi.org/10.1103/physrevb.95.174441

We present the results of neutron scattering experiments to study the crystal and magnetic structures of the Mott-insulating transition metal oxyselenides Pr2O2M2OSe2 (M = Mn, Fe). The structural role of the non-Kramers Pr3+ ion was investigated, and... Read More about Crystal field excitations and magnons: Their roles in oxyselenides Pr2O2M2OSe2 (M = Mn, Fe).

Infinitely Adaptive Transition-Metal Ordering in Ln2O2MSe2-Type Oxychalcogenides (2015)
Journal Article
Ainsworth, C. M., Wang, C., Johnston, H. E., McCabe, E. E., Tucker, M. G., Brand, H. E., & Evans, J. S. (2015). Infinitely Adaptive Transition-Metal Ordering in Ln2O2MSe2-Type Oxychalcogenides. Inorganic Chemistry, 54(15), 7230-7238. https://doi.org/10.1021/acs.inorgchem.5b00599

The origin of transition-metal ordering in Ln2O2MSe2 oxychalcogenides has been revealed by investigating a range of solid solutions. Transition-metal ordering is determined by the relative sizes of [Ln2O2]2+ and [MSe2]2− layers and can be exquisitely... Read More about Infinitely Adaptive Transition-Metal Ordering in Ln2O2MSe2-Type Oxychalcogenides.

Infinitely Adaptive Transition Metal Oxychalcogenides: The Modulated Structures of Ce2O2MnSe2 and (Ce0.78La0.22)2O2MnSe2 (2015)
Journal Article
Wang, C., Ainsworth, C. M., Gui, D., McCabe, E. E., Tucker, M. G., Evans, I. R., & Evans, J. S. (2015). Infinitely Adaptive Transition Metal Oxychalcogenides: The Modulated Structures of Ce2O2MnSe2 and (Ce0.78La0.22)2O2MnSe2. Chemistry of Materials, 27(8), 3121-3134. https://doi.org/10.1021/acs.chemmater.5b00666

This article reports the syntheses, structures, and physical properties of the oxychalcogenides (Ce1–xLax)2O2MnSe2 with x = 0–0.7. These materials have a layered structure related to that of the LaOFeAs-derived superconductors but with the transition... Read More about Infinitely Adaptive Transition Metal Oxychalcogenides: The Modulated Structures of Ce2O2MnSe2 and (Ce0.78La0.22)2O2MnSe2.

Magnetism of the Fe2+ and Ce3+ sublattices in Ce2O2FeSe2: A combined neutron powder diffraction, inelastic neutron scattering, and density functional study (2014)
Journal Article
McCabe, E., Stock, C., Bettis Jr., J., Whangbo, M., & Evans, J. (2014). Magnetism of the Fe2+ and Ce3+ sublattices in Ce2O2FeSe2: A combined neutron powder diffraction, inelastic neutron scattering, and density functional study. Physical review B, 90(23), Article 235115. https://doi.org/10.1103/physrevb.90.235115

The discovery of superconductivity in the 122 iron selenide materials above 30 K necessitates an understanding of the underlying magnetic interactions. We present a combined experimental and theoretical investigation of magnetic and semiconducting Ce... Read More about Magnetism of the Fe2+ and Ce3+ sublattices in Ce2O2FeSe2: A combined neutron powder diffraction, inelastic neutron scattering, and density functional study.

Structural and magnetic characterization of iron oxyselenides Ce2O2Fe2OSe2 and Nd2O2Fe2OSe2 (2014)
Journal Article
McCabe, E., Wills, A., Chapon, L., Manuel, P., & Evans, J. (2014). Structural and magnetic characterization of iron oxyselenides Ce2O2Fe2OSe2 and Nd2O2Fe2OSe2. Physical review B, 90(16), Article 165111. https://doi.org/10.1103/physrevb.90.165111

We present here an investigation of the magnetic ordering in the Mott insulating oxyselenide materials Ln2O2Fe2OSe2 (Ln=Ce, Nd). Neutron powder diffraction data are consistent with a noncollinear multi-k ordering on the iron sublattice structure and... Read More about Structural and magnetic characterization of iron oxyselenides Ce2O2Fe2OSe2 and Nd2O2Fe2OSe2.

Weak spin interactions in Mott insulating La2O2Fe2OSe2 (2014)
Journal Article
McCabe, E., Stock, C., Rodriguez, E., Wills, A., Taylor, J., & Evans, J. (2014). Weak spin interactions in Mott insulating La2O2Fe2OSe2. Physical review B, 89(10), Article 100402(R). https://doi.org/10.1103/physrevb.89.100402

Identifying and characterizing the parent phases of iron-based superconductors is an important step towards understanding the mechanism for their high-temperature superconductivity. We present an investigation into the magnetic interactions in the Mo... Read More about Weak spin interactions in Mott insulating La2O2Fe2OSe2.

Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2 (2013)
Journal Article
Tuxworth, A. J., McCabe, E. E., Free, D. G., Clark, S. J., & Evans, J. S. (2013). Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2. Inorganic Chemistry, 52(4), 2078-2085. https://doi.org/10.1021/ic302484x

La2O2ZnSe2 adopts an unusual cation-ordered LaCuOS-related structure with both stripe- and checkerboard-ordered regions. Its structure has been determined using the symmetry mode approach. Optical measurements indicate that it is a wide band gap semi... Read More about Structural Characterization and Physical Properties of the New Transition Metal Oxyselenide La2O2ZnSe2.

Preparation, Characterization, and Structural Phase Transitions in a New Family of Semiconducting Transition Metal Oxychalcogenides beta-La(2)O(2)MSe(2) (M = Mn, Fe) (2010)
Journal Article
McCabe, E., Free, D., Mendis, B., Higgins, J., & Evans, J. (2010). Preparation, Characterization, and Structural Phase Transitions in a New Family of Semiconducting Transition Metal Oxychalcogenides beta-La(2)O(2)MSe(2) (M = Mn, Fe). Chemistry of Materials, 22(22), 6171-6182. https://doi.org/10.1021/cm1023103