K Kodama et al 2005 J. Phys.: Condens. Matter 17 L61 doi:10.1088/0953-8984/17/4/L02
K Kodama1, S Miyahara2, M Takigawa1,7, M Horvatić3, C Berthier3,4, F Mila5, H Kageyama6 and Y Ueda1
Show affiliationsWe observed a field-induced staggered magnetization in the 2D frustrated dimer singlet spin system SrCu2(BO3)2 by 11B NMR, from which the magnitudes of the intradimer Dzyaloshinsky–Moriya interaction and the staggered g-tensor were determined. These anisotropic interactions cause singlet–triplet mixing and eliminate a quantum phase transition at the expected critical field Hc for gap closing. They provide a quantitative account for some puzzling phenomena such as the onset of a uniform magnetization below Hc and the persistence of the excitation gap above Hc. The gap was accurately determined from the activation energy of the nuclear relaxation rate.
75.30.Et Exchange and superexchange interactions
75.10.Jm Quantized spin models
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
Issue 4 (2 February 2005)
Received 22 November 2004, in final form 4 January 2005
Published 14 January 2005
K Kodama et al 2005 J. Phys.: Condens. Matter 17 L61
Alexander Tselev et al 2004 Nanotechnology 15 1475
Calum S Neish et al 2003 Nanotechnology 14 864
Simo Saarakkala et al 2009 Phys. Med. Biol. 54 6837
Honglian Xiong et al 2008 Phys. Med. Biol. 53 6767
E V Zagaynova et al 2008 Phys. Med. Biol. 53 4995
Beau A Standish et al 2010 Phys. Med. Biol. 55 615
I Grout et al 2005 J. Phys.: Conf. Ser. 15 244
J Schmitt and J Clark 2009 Bioinspir. Biomim. 4 046005
Tommaso Dorigo 2006 J. Phys.: Conf. Ser. 53 163