H
Hannu Mutka
Researcher at Academy of Sciences of Moldova
Publications - 150
Citations - 4689
Hannu Mutka is an academic researcher from Academy of Sciences of Moldova. The author has contributed to research in topics: Inelastic neutron scattering & Neutron scattering. The author has an hindex of 34, co-authored 150 publications receiving 4202 citations. Previous affiliations of Hannu Mutka include University of Melbourne & Iowa State University.
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Journal ArticleDOI
Bose–Einstein condensation of the triplet states in the magnetic insulator TlCuCl3
Ch. Rüegg,N. Cavadini,Albert Furrer,Hans-Ulrich Güdel,Karl Krämer,Hannu Mutka,Andrew Wildes,Klaus Habicht,P. Vorderwisch +8 more
TL;DR: An experimental investigation of the excitation spectrum in such a field-induced magnetically ordered state, using inelastic neutron scattering measurements of TlCuCl3 single crystals confirms unambiguously the theoretically predicted gapless Goldstone mode characteristic of the Bose–Einstein condensation of the triplet states.
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Breakdown of phonon glass paradigm in La- and Ce-filled Fe(4)Sb(12) skutterudites
TL;DR: These results give unequivocal evidence of essentially temperature-independent lattice dynamics with well-defined phase relations between guest and host dynamics, indicative of a quasi-harmonic coupling between the guests and the host lattice.
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Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
Ch. Rüegg,Bruce Normand,Masashige Matsumoto,Albert Furrer,D. F. McMorrow,Karl Krämer,Hans-Ulrich Güdel,S. N. Gvasaliya,Hannu Mutka,Martin Boehm +9 more
TL;DR: The continuous emergence in the weakly ordered state of a low-lying but massive excitation corresponding to longitudinal fluctuations of the magnetic moment is demonstrated by neutron spectroscopy.
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Design of Single-Molecule Magnets: Insufficiency of the Anisotropy Barrier as the Sole Criterion.
Kasper S. Pedersen,Kasper S. Pedersen,Jan Dreiser,Jan Dreiser,Høgni Weihe,Romain Sibille,Heini V. Johannesen,Mikkel Sørensen,Bjarne E. Nielsen,Marc Sigrist,Hannu Mutka,Stéphane Rols,Jesper Bendix,Stergios Piligkos +13 more
TL;DR: It is unambiguously demonstrated, solely on the basis of experimental data, that Orbach relaxation cannot a priori be considered as the main mechanism determining the spin dynamics of SMMs and consideration of additional design criteria that address the presence of alternative relaxation processes beyond the traditional double-well picture is required.
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Modifying the properties of 4f single-ion magnets by peripheral ligand functionalisation
Kasper S. Pedersen,Liviu Ungur,Marc Sigrist,Alexander Sundt,Magnus Schau-Magnussen,Veacheslav Vieru,Hannu Mutka,Stéphane Rols,Høgni Weihe,Oliver Waldmann,Liviu F. Chibotaru,Jesper Bendix,Jan Dreiser +12 more
TL;DR: In this article, the authors studied the ligand field splittings and magnetic properties of three ErIII single-ion magnets which differ in the peripheral ligand sphere but exhibit similar first coordination spheres by inelastic neutron scattering (INS) and SQUID magnetometry.