Helical ground state and weak ferromagnetism in the edge-shared chain cuprate

S.-L. Drechsler; J. Richter; A. A. Gippius; A. Vasiliev; A. A. Bush; A. S. Moskvin; J. Málek; Yu. Prots; W. Schnelle; H. Rosner

doi:10.1209/epl/i2005-10356-y

All issues

Volume 73 / No 1 (January 2006)

Europhys. Lett., 73 1 (2006) 83-89

Abstract

Issue		Europhys. Lett. Volume 73, Number 1, January 2006


Page(s)		83 - 89
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2005-10356-y
Published online		02 December 2005

Europhys. Lett., 73 (1), pp. 83-89 (2006)

Helical ground state and weak ferromagnetism in the edge-shared chain cuprate $\chem{NaCu_2O_2}$

S.-L. Drechsler¹, J. Richter², A. A. Gippius³, A. Vasiliev³, A. A. Bush⁴, A. S. Moskvin⁵, J. Málek⁶, Yu. Prots⁷, W. Schnelle⁷ and H. Rosner⁷

¹ IFW Dresden - P.O. Box 270116, D-01171 Dresden, Germany
² Institut für Theoretische Physik, O.-v.-Guericke-Universität Magdeburg - Germany
³ Moscow State University - Russia
⁴ Moscow Institute of Radiotechnics, Electronics and Automation - Russia
⁵ Ural State University - Ekaterinburg, Russia
⁶ Institute of Physics ASCR - Prague, Czech Republic
⁷ Max-Planck-Institut für Chemische Physik fester Stoffe - Dresden, Germany

Corresponding author: drechsler@ifw-dresden.de

Received: 15 September 2005
Accepted: 26 October 2005

Abstract

We report on susceptibility, magnetization, $\chem{^{23}Na}$ NMR, and specific heat data of the spin-chain material $\chem{NaCu_2O_2}$ in the paramagnetic and ordered phases. Below 13 K, where a sharp field-dependent specific heat peak appears, the NMR lineshape points to an incommensurate static modulation of the local magnetic field consistent with a spiral state of the Cu magnetic moments. At 2 K weak ferromagnetism with an ordered moment of about 4 $\cdot 10^{-3}\mu_{\rm B}$ has been observed. LDA-based estimates of exchange integrals reveal a large inchain frustration leading to a magnetic spiral.

PACS: 74.72.Jt – Other cuprates, including Tl and Hg-based cuprates / 76.60.-k – Nuclear magnetic resonance and relaxation / 75.10.Pq – Spin chain models

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.