Suppressed incommensurate order in swedenborgite Ca0.5Y0.5BaCo4O7

Autor: Feng Ye, Shang Gao, Vilmos Kocsis, Yasujiro Taguchi, Yaohua Liu, Andrew F. May, Yoshinori Tokura, Minoru Soda, Matthew B. Stone, Werner Schweika, Andrew D. Christianson, Taka-hisa Arima

Publikováno v: Physical Review B. 104

Swedenborgite Ca${}_{0.5}$Y${}_{0.5}$BaCo${}_{4}$O${}_{7}$, with geometrically frustrated kagome and triangular lattices, exhibits a disordered ground state in spite of strong antiferromagnetic coupling between the Co spins. Here, the authors perform

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https://doi.org/10.1103/physrevb.104.l140408

Neutron diffraction study and theoretical analysis of the antiferromagnetic order and the diffuse scattering in the layered kagome system CaBaCo2Fe2O7

Autor: Julien Robert, E. Rosén, Johannes D. Reim, Oksana Zaharko, Martin Valldor, Maxim Mostovoy, Werner Schweika

Publikováno v: Physical Review B. 97

The hexagonal swedenborgite, CaBaCo2Fe2O7, is a chiral frustrated antiferromagnet, in which magnetic ions form alternating kagome and triangular layers. We observe a long-range 3×3 antiferromagnetic order setting in below TN=160 K by neutron diffrac

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https://doi.org/10.1103/physrevb.97.144402

Structural invariance upon antiferromagnetic ordering in geometrically frustrated swedenborgite, CaBaCo2Fe2O7

Autor: Manfred Fiebig, Johannes Reim, E. Rosén, Dennis Meier, Marcus Schmidt, Martin Valldor, Naëmi Leo, Martin Meven, Werner Schweika, Zhiwei Hu, Chang Yang Kuo, Tun-Wen Pi

Publikováno v: Journal of Applied Crystallography. 47:2038-2047

Centimetre-sized single crystals of high-quality CaBaCo2Fe2O7were synthesized by the optical floating zone technique. The metal-to-metal stoichiometry and oxygen content were confirmed by spectroscopy and thermal reduction experiments. The hexagonal

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https://doi.org/10.1107/s1600576714023528

Performance study of the Jalousie detector baseline design for the ESS thermal powder diffractometer HEIMDAL through GEANT4 simulations

Autor: I. Stefanescu, D. Mannix, U. Stuhr, K. Iversen, Werner Schweika, C.J. Schmidt, Mogens Christensen, Richard Hall-Wilton, Jürg Schefer, S. Holm-Dahlin, M. Klein

Publikováno v: Journal of Instrumentation 14(10), P10020-P10020 (2019). doi:10.1088/1748-0221/14/10/P10020
Stefanescu, I, Christensen, M, Hall-Wilton, R, Holm-Dahlin, S, Iversen, K, Klein, M, Mannix, D, Schefer, J, Schmidt, C J, Schweika, W & Stuhr, U 2019, ' Performance study of the Jalousie detector baseline design for the ESS thermal powder diffractometer HEIMDAL through GEANT4 simulations ', Journal of Instrumentation, vol. 14, P10020 . https://doi.org/10.1088/1748-0221/14/10/P10020

Journal of Instrumentation 14(10), P10020 - P10020 (2019). doi:10.1088/1748-0221/14/10/P10020
HEIMDAL is a thermal powder diffractometer designed to operate at the European Spallation Source, world's most intense neutron source. The detailed des

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https://doi.org/10.1088/1748-0221/14/10/p10020

Neutron detectors for the ESS diffractometers

Autor: Grzegorz Nowak, J. Fenske, Mogens Christensen, D. Raspino, Paul F. Henry, E.M. Schooneveld, Oliver Kirstein, Jürg Schefer, J. Šaroun, N.J. Rhodes, Richard Hall-Wilton, D. Pooley, I. Stefanescu, M. Mueller, Werner Schweika, J. Sykora

Publikováno v: Stefanescu, I, Christensen, M, Fenske, J, Hall-Wilton, R, Henry, P F, Kirstein, O, Mueller, M, Nowak, G, Pooley, D, Raspino, D, Rhodes, N, Saroun, J, Schefer, J, Schooneveld, E, Sykora, J & Schweika, W 2017, ' Neutron detectors for the ESS diffractometers ', Journal of Instrumentation, vol. 12 . https://doi.org/10.1088/1748-0221/12/01/P01019
Journal of Instrumentation
arXiv.org e-Print Archive
Stefanescu, I.; Christensen, M.; Fenske, J.; R. Hall-Wilton, R.; Henry, P.; Kirstein, O.; Mueller, M.; Nowak, G.; Pooley, D.; Raspino, D.; Rhodes, N.; Saroun, J.; Schefer, J.; Schooneveld, E.; Sykora, J.; Schweika, W. : Neutron detectors for the ESS diffractometers. In: Journal of Instrumentation . Vol. 12 (2017) P01019. (DOI: 10.1088/1748-0221/12/01/P01019)

The ambitious instrument suite for the future European Spallation Source whose civil construction started recently in Lund, Sweden, demands a set of diverse and challenging requirements for the neutron detectors. For instance, the unprecedented high

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