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Temperature Dependence of the Hyperfine Magnetic Field at Fe Sites in Ba-Doped BiFeO$_3$ Thin Films Studied by Emission Mössbauer Spectroscopy
/ Heiniger-Schell, Juliana (CERN ; Duisburg-Essen U.) ; Bharuth-Ram, Krish (ENS, Lyon, Lab. Phys. ; KwaZulu Natal U. ; DUT, Durban) ; Naicker, Kimara (ENS, Lyon, Lab. Phys. ; KwaZulu Natal U.) ; Masondo, Vusumuzi (DUT, Durban) ; Dang, Thien Thanh (Duisburg-Essen U.) ; Escobar, Marianela (Duisburg-Essen U.) ; Díaz-Guerra, Carlos (Madrid U.) ; Marschick, Georg (Vienna, Tech. U.) ; Masenda, Hilary (Witwatersrand U.) ; Gunnlaugsson, Haraldur P (Iceland U.) et al.
Emission $^{57}$Fe Mössbauer spectroscopy (eMS), following the implantation of radioactive $^{57}$Mn+ ions, has been used to study the temperature dependence of the hyperfine magnetic field at Fe sites in Ba-doped BiFeO$_3$ (BFO) thin films. $^{57}$Mn β decays (t$_{1/2}$ = 90 s) to the 14.4 keV Mössbauer state of $^{57}$Fe, thus allowing online eMS measurements at a selection of sample temperatures during Mn implantation. [...]
2023 - 13 p.
- Published in : Crystals 13 (2023) 724
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Report of the Topical Group on Cosmic Probes of Fundamental Physics for for Snowmass 2021
/ Adhikari, Rana X. (Caltech) ; Anchordoqui, Luis A. (Lehman Coll. ; City Coll., N.Y. ; Amer. Museum Natural Hist.) ; Fang, Ke (Wisconsin U., Madison) ; Sathyaprakash, B.S. (Penn State U., University Park, IGC ; Penn State U., Astron. Astrophys. ; Cardiff U.) ; Tollefson, Kirsten (Michigan State U.) ; Lewis, Tiffany R. (NASA, Goddard) ; Engel, Kristi (Maryland U. ; Los Alamos) ; Aboubrahim, Amin (U. Munster) ; Akarsu, Ozgur (Istanbul, Tech. U.) ; Akrami, Yashar (Case Western Reserve U.) et al.
Cosmic Probes of Fundamental Physics take two primary forms: Very high energy particles (cosmic rays, neutrinos, and gamma rays) and gravitational waves. [...]
arXiv:2209.11726.
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Charge and spin state of dilute Fe in NaCl and LiF
/ ISOLDE Collaboration
There is an apparent mismatch between electron paramagnetic resonance and Mössbauer spectroscopy results on the charge and spin states of dilute Fe impurities in NaCl; Mössbauer spectroscopy data have been interpreted in terms of high-spin Fe$^{2+}$, while electron paramagnetic resonance studies suggest low-spin Fe$^{1+}$. In the present study, the charge and spin states of dilute substitutional Fe impurities in NaCl and LiF have been investigated with $^{57}$Mn → $^{57}$Fe emission Mössbauer spectroscopy. [...]
2022 - 10 p.
- Published in : Phys. Rev. B 106 (2022) 174108
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Unusual charge states and lattice sites of Fe in Al$_{x}$Ga$_{1−x}$N:Mn
/ Masenda, Hilary (Witwatersrand U. ; Philipps U. Marburg) ; Gunnlaugsson, Haraldur Páll (Iceland U.) ; Adhikari, Rajdeep (Linz U.) ; Bharuth-Ram, Krish (DUT, Durban) ; Naidoo, Deena (Witwatersrand U.) ; Tarazaga Martín-Luengo, Aitana (Linz U.) ; Unzueta, Iraultza (Basque U., Bilbao) ; Mantovan, Roberto (CNR-IMM, Catania) ; Mølholt, Torben Esmann (CERN) ; Johnston, Karl (CERN) et al.
Charge states and lattice sites of Fe ions in virgin and Mn-doped Al$_{x}$Ga$_{1−x}$N samples were investigated using $^{57}$Fe emission Mössbauer spectroscopy following radioactive $^{57}$Mn$^{+}$ ion implantation at ISOLDE, CERN. In the undoped Al$_{x}$Ga$_{1−x}$N, Fe$^{2+}$ on Al/Ga sites associated with nitrogen vacancies and Fe$^{3+}$ on substitutional Al/Ga sites are identified. [...]
2022 - 12 p.
- Published in : New J. Phys. 24 (2022) 103007
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Tests of General Relativity with GWTC-3
/ LIGO Scientific Collaboration
The ever-increasing number of detections of gravitational waves (GWs) from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensitive tests of general relativity (GR) in the dynamical and strong-field regime of gravity. [...]
arXiv:2112.06861 ; LIGO-P2100275.
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41 p.
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Emission Mössbauer spectroscopy of superconducting NbN thin films implanted with magnetic species
/ Bonanni, Alberta (Institute of Semiconductors and Solid State Physics, Johannes Kepler University, 69 Altenbergerstrasse, 4040 Linz, Austria) ; Adhikari, Rajdeep (Institute of Semiconductors and Solid State Physics, Johannes Kepler University, 69 Altenbergerstrasse, 4040 Linz, Austria) ; Vorhauer, Julia (Institute of Semiconductors and Solid State Physics, Johannes Kepler University, 69 Altenbergerstrasse, 4040 Linz, Austria) ; Ernst, Arthur (Institute of Semiconductors and Solid State Physics, Johannes Kepler University, 69 Altenbergerstrasse, 4040 Linz, Austria) ; Masenda, Hilary (School of Physics, University of the Witwatersrand, South Africa) ; Gunnlaugasson, Haraldur Pall (University of Iceland, Dunhaga 3, IS-107 Reykjavík, Iceland) ; Johnston, Karl (PH Department, ISOLDE/CERN, 1211 Geneva 23, Switzerland) ; Schnell, Juliana (PH Department, ISOLDE/CERN, 1211 Geneva 23, Switzerland) ; Bharauth Ram, Krishanlal (Dept. of Physics, Univ. Kwazulu-Natal, South Africa.)
CERN-INTC-2020-063 ; INTC-P-578.
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2020.
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Lattice sites, charge and spin states of Fe in In$_{x}$Ga$_{1-x}$N studied with emission Mössbauer spectroscopy
/ Masenda, Hilary (School of Physics, University of the Witwatersrand) ; Gunnlaugsson, Haraldur Páll (Science Institute, University of Iceland) ; Naidoo, Deena (School of Physics, University of the Witwatersrand) ; Bharuth-Ram, Krish (School of Physics, Durban University of Technology) ; Mantovan, Roberto (Laboratorio MDM, IMM-CNR,) ; Gíslason, Hafliði Pétur (Science Institute, University of Iceland) ; Vantomme, André (Instituut voor Kern-en Stralings fysika, KU Leuven) ; Bonanni, Alberta (Institute for Semiconductor and Solid State Physics, Johannes Kepler University) ; Adhikari, Rajdeep (Institute for Semiconductor and Solid State Physics, Johannes Kepler University) ; Bockstedte, Michel (Institute for Theoretical Physics, Johannes Kepler University) et al.
CERN-INTC-2020-006 ; INTC-SR-101.
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2020.
Fulltext - Original Document (INTC-P-485)
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