Field induced antiferromagnetism and ${}^{17}$O Knight shift anomaly in La${}_2$CuO${}_4$

Abstract

We address the effect of the field induced antiferromagnetism in paramagnetic state of the cuprate weak ferromagnet La${}_2$CuO${}_4$. The planar oxygen ${}^{17}$O Knight shift is shown to be an effective tool to inspect the effects of Dzyaloshinsky-Moriya coupling in cuprates in an external magnetic field. Field induced antiferromagnetism and anisotropic antiferromagnetic contribution to ${}^{17}$K explain the anomalies observed in ${}^{17}$O NMR in La${}_2$CuO${}_4$. The experimental observation of antiferromagnetic contribution to the ${}^{17}$O Knight shift provides probably the only way to find out the problem of the sense of Dzyaloshinsky vector in cuprates.

4 pages, 1 figure, submitted to PRB

References in corpus (2)

• Field-induced chiral phase in isotropic frustrated spin chains
• Giant spin canting in the S = 1/2 antiferromagnetic chain [CuPM(NO3)2(H2O)2]n observed by 13C-NMR

Cited by in corpus (8)

• Interplay of p-d and d-d charge transfer transitions in rare-earth perovskite manganites
• Microscopic mechanisms of spin-dependent electric polarization in 3d oxides
• Field-induced staggered magnetic moment in the quasi-two-dimensional organic Mott insulator $\kappa$-(BEDT-TTF)${}_2$Cu[N(CN)${}_2$]Cl
• Dzyaloshinskii-Moriya coupling in 3d insulators
• Dzyaloshinskii interaction and exchange-relativistic effects in orthoferrites
• Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4
• Microscopic mechanisms of spin-dependent electric polarization in 3d oxides
• Universal scaling in the Knight shift anomaly of doped periodic Anderson model