[Zurück]


Zeitschriftenartikel:

S. Drechsler, J. Richter, R. Kuzian, J. Málek, N. Tristan, B. Büchner, A. Moskvin, A. Gippius, A. Vasiliev, O. Volkova, A. Prokofiev, H. Rakoto, J. Broto, W. Schnelle, M. Schmitt, A. Ormeci, C. Loison, H. Rosner:
"Helimagnetism and weak ferromagnetism in edge-shared chain cuprates";
Journal of Magnetism and Magnetic Materials, 316 (2007), S. 306 - 312.



Kurzfassung englisch:
Helimagnetism and weak ferromagnetism in edge-shared chain cuprates

S.-L. Drechsler a, J. Richter b, R. Kuzian c, J. Málek d, N. Tristan a, B. Büchner a, A.S. Moskvin e, A.A. Gippius f, A. Vasiliev f, O. Volkova f, A. Prokofiev g, H. Rakoto h, J.-M. Broto h, W. Schnelle i, M. Schmitt i, A. Ormeci i, C. Loison i, H. Rosner i

a Leibniz-Institut für Festkörper- und Werkstoffforschung IFW Dresden, Postfach 270116, D-01171 Dresden, Germany
b Institut für Theoretische Physik, Universität Magdeburg, D-39016 Magdeburg, Germany
c Institute for Problems of Materials Science, Kiev, Ukraine
d Institute of Physics, ASCR, Prague, Czech Republic
e Ural State University, 620083 Ekaterinburg, Russia
f Moscow State University, 119992 Moscow, Russia
g Institut für Festkörperphysik, Technische Universität Wien, A-1040 Wien, Austria
h Laboratoire National de Champs Magnétiques Pulsés, 31432 Toulouse, France
i Max-Planck-Institut für Chemische Physik fester Stoffe, D-01187 Dresden, Germany

Abstract

The present understanding of a novel growing class of chain cuprates with intriguing magnetic properties is reviewed. Among them, several undoped edge-shared CuO2 chain compounds show at low temperature a clear tendency to helicoidal magnetical ordering with acute pitch angles and sometimes also to weak ferromagnetism. Our analysis is based on the isotropic 1D frustrated J1-J2 Heisenberg model with ferromagnetic (FM) 1st neighbor and antiferromagnetic 2nd neighbor exchange. The achieved assignment is supported by microscopic calculations of the electronic and magnetic structure. We consider Na(Li)Cu2O2, LiVCuO4 as the best studied helimagnets, Li2ZrCuO4 and other systems close to a FM quantum critical point, as well as Li2CuO2 with FM inchain ordering. The interplay of frustrated inchain couplings, anisotropy and interchain exchange is discussed.

Schlagworte:
Edge-shared cuprate chain; Quantum helix; Weak ferromagnetism; High-field magnetization


"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1016/j.jmmm.2007.03.200

Elektronische Version der Publikation:
http://dx.doi.org/10.1016/j.jmmm.2007.03.200


Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.