Rare Earth Magnetism

Magnetism in Metals


Seminars and Lectures

Niels Bohr Institute









Jens Jensen


Address: Niels Bohr Institute
  Universitetsparken 5
  DK-2100 Copenhagen
Mobile: +45 23984007
Email: jens@fys.ku.dk
Office: D120


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).