Research area:
I am working on the theory of magnetic structures and excitations in
condensed matter systems with localized moments, i.e. primarily systems
containing ions from the series of the Lanthanides or the Actinides.
I have written a monograph on the subject in collaboration with Allan
Mackintosh:
Jens Jensen and Allan R. Mackintosh: Rare Earth Magnetism: Structures
and Excitations
published by Clarendon Press, Oxford, England in
1991.
Des McMorrow, Henrik Rønnow and I have edited the
proceedings of
Magnetism in Metals, a symposium in memory of Allan Mackintosh
(1936-95), Copenhagen, August 26-29, 1996 and published by The Royal
Danish Academy of Sciences and Letters in Matematisk-fysiske Meddelelser
45 (1997).
Recent
publications:
U. B. Hansen, O. F.
Syljuåsen, J. Jensen, T. K. Schãffer, C. R. Andersen, M. Boehm, J. A.
Rodriguez-Rivera, N. B. Christensen, K. Lefmann,
Magnetic Bloch oscillations and domain wall dynamics in a near-Ising
ferromagnetic chain, Nat. Commun. 13, 2547
(2022). Additional information:
Supplement.
R. Toft-Petersen, T. B. S. Jensen, J. Jensen, M. v. Zimmermann, S. Sloth,
F. W. Isaksen, N. B. Christensen, Y. Chen, K. Siemensmeyer, H. Kawano-Furukawa, H. Takeya, A. B. Abrahamsen, and N. H. Andersen,
Magnetoelastic phase diagram of TbNi2B2C, Phys. Rev. B 97, 224417 (2018).
J. Jensen, J. Larsen, and U. B. Hansen,
Comprehensive cluster-theory analysis of the magnetic structures and
excitations in CoCl2·2H2O, Phys. Rev. B
97, 024423 (2018).
J. Larsen, T. K. Schäffer, U.
B. Hansen, S. L. Holm, S. R. Ahl, R. Toft-Petersen, J. Taylor, G. Ehlers, J. Jensen,
H. M. Rønnow, K. Lefmann, and N. B. Christensen,
Spin Excitations and Quantum Criticality in the Quasi One-Dimensional
Ising-Like Ferromagnet CoCl2·2D2O in a Transverse
Field, Phys. Rev. B
96, 174424 (2017).
Recent
seminars:
Linear Response
Theory and the Random Phase Approximation (International workshop on
McPhase, Heinz Maier - Leibnitz Zentrum, Munich, 5.-7. November 2014).
Chiral spin-wave excitations of the spin-5/2 trimers in the
langasite compound
Ba3NbFe3Si2O14
(TEMM, Rutherford-Appleton Laboratory, Oxfordshire, June 2011).
Bose-Einstein
condensation - in the spin-dimer system TlCuCl3(?) (Niels Bohr Institute, Copenhagen, November 2009).
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