title: Field-stepped broadband NMR in pulsed magnets and application to SrCu2(BO3)2 at 54T.
abstract: Pulsed magnets generate the highest magnetic fields as brief transients during which the observation of NMR is difficult, however, this is the only route to unique insight into material properties up to the regime of 100T. Here, it is shown how rather broad NMR spectra can be assembled in a pulsed magnet during a single field pulse by using the inherent time dependence of the field for the recording of field-stepped free induction decays that cover a broad frequency range. The technique is then applied to (11)B NMR of the spin-dimer system SrCu2(BO3)2, a magnetic insulator known to undergo a series of field-driven changes of the magnetic ground state. At peak fields of about 54T at the Dresden High Magnetic Field Laboratory, (11)B NMR spectra spanning a total of about 9MHz width are reconstructed. The results are in good accordance with a change from a high-temperature paramagnetic state to a low-temperature commensurate superstructure of field-induced spin-dimer triplets.
authors.affiliation: University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, 04103 Leipzig, Germany. Electronic address: kohlrautz@physik.uni-leipzig.de.
authors.forename: J
authors.initials: J
authors.lastname: Kohlrautz
authors.affiliation: University of Leipzig, Faculty of Physics and Earth Sciences, Linnéstraße 5, 04103 Leipzig, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Haase
authors.affiliation: Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany.
authors.forename: E L
authors.initials: EL
authors.lastname: Green
authors.affiliation: Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany.
authors.forename: Z T
authors.initials: ZT
authors.lastname: Zhang
authors.affiliation: Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany; Institut für Festkörperphysik, TU Dresden, 01062 Dresden, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Wosnitza
authors.affiliation: Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Herrmannsdörfer
authors.affiliation: Brockhouse Institute for Materials Research and Department of Physics and Astronomy, McMaster University, 1280 Main Str West, ON L8S 4M1, Canada.
authors.forename: H A
authors.initials: HA
authors.lastname: Dabkowska
authors.affiliation: Brockhouse Institute for Materials Research and Department of Physics and Astronomy, McMaster University, 1280 Main Str West, ON L8S 4M1, Canada.
authors.forename: B D
authors.initials: BD
authors.lastname: Gaulin
authors.affiliation: National Institute of Chemical Physics and Biophysics (NICPB), Akadeemia Tee 23, 12618 Tallinn, Estonia.
authors.forename: R
authors.initials: R
authors.lastname: Stern
authors.affiliation: Dresden High Magnetic Field Laboratory (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Kühne
keywords: NMR; Pulsed high field; SrCu(2)(BO(3))(2)