Revisiting and modeling the magnetism of hole-doped CuO2 spin chains in Sr14-xCaxCu24O41

被引:0
作者
Schnack, J. [1 ]
Klingeler, R.
Kataev, V.
Buechner, B.
机构
[1] Univ Osnabruck, Dept Phys, D-49069 Osnabruck, Germany
[2] IFW Dresden, Inst Solid State & Mat Res, D-01171 Dresden, Germany
关键词
strongly correlated electron systems; cuprates; magnetization; EPR;
D O I
10.1016/j.jmmm.2006.10.380
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Magnetization measurements of Sr14-xCaxCu24O41 with 0 <= x <= 12 in magnetic fields up to 16 T show that the low-temperature magnetic response of the CuO2 spin chains changes strongly upon Ca doping. For x = 0 quantum statistical simulations yield that the temperature and field dependence of the magnetization can be well described by an effective Heisenberg model in which the ground state configuration is composed of spin dimers, trimers, and monomers. For x > 0 a constant contribution to the low-temperature magnetic susceptibility is observed which cannot be explained in terms of simple chain models. Alternative scenarios are outlined. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:E397 / E399
页数:3
相关论文
共 10 条
[1]   Interplay between magnetism, charge localization, and structure in Sr14-xCaxCu24O41 [J].
Ammerahl, U ;
Büchner, B ;
Colonescu, L ;
Gross, R ;
Revcolevschi, A .
PHYSICAL REVIEW B, 2000, 62 (13) :8630-8633
[2]   Sr14Cu24O41:: a complete model for the chain sub-system [J].
Gellé, A ;
Lepetit, MB .
EUROPEAN PHYSICAL JOURNAL B, 2005, 46 (04) :489-496
[3]   Influence of the incommensurability in Sr14-xCaxCu24O41 family compounds -: art. no. 236402 [J].
Gellé, A ;
Lepetit, MB .
PHYSICAL REVIEW LETTERS, 2004, 92 (23) :236402-1
[4]   Magnon-hole scattering and charge order in Sr14-xCaxCu24O41 -: art. no. 027005 [J].
Hess, C ;
ElHaes, H ;
Büchner, B ;
Ammerahl, U ;
Hücker, M ;
Revcolevschi, A .
PHYSICAL REVIEW LETTERS, 2004, 93 (02) :027005-1
[5]   Wigner crystallization in Na3Cu2O4 and Na8Cu5O10 chain compounds -: art. no. 076403 [J].
Horsch, P ;
Sofin, M ;
Mayr, M ;
Jansen, M .
PHYSICAL REVIEW LETTERS, 2005, 94 (07)
[6]   Interplay of spin and charge dynamics in Sr14-xCaCu24O41 -: art. no. 104422 [J].
Kataev, V ;
Choi, KY ;
Grüninger, M ;
Ammerahl, U ;
Büchner, B ;
Freimuth, A ;
Revcolevschi, A .
PHYSICAL REVIEW B, 2001, 64 (10)
[7]   Magnetism of hole-doped CuO2 spin chains in Sr14Cu24O41:: Experimental and numerical results -: art. no. 014426 [J].
Klingeler, R ;
Büchner, B ;
Choi, KY ;
Kataev, V ;
Ammerahl, U ;
Revcolevschi, A ;
Schnack, J .
PHYSICAL REVIEW B, 2006, 73 (01)
[8]  
KLINGELER R, 2005, PHYS REV B, DOI UNSP 184406
[9]   Hole distribution in (Sr,Ca,Y,La)14Cu24O41 ladder compounds studied by x-ray absorption spectroscopy [J].
Nücker, N ;
Merz, M ;
Kuntscher, CA ;
Gerhold, S ;
Schuppler, S ;
Neudert, R ;
Golden, MS ;
Fink, J ;
Schild, D ;
Stadler, S ;
Chakarian, V ;
Freeland, J ;
Idzerda, YU ;
Conder, K ;
Uehara, M ;
Nagata, T ;
Goto, J ;
Akimitsu, J ;
Motoyama, N ;
Eisaki, H ;
Uchida, S ;
Ammerahl, U ;
Revcolevschi, A .
PHYSICAL REVIEW B, 2000, 62 (21) :14384-14392
[10]   Strong Coulomb effects in hole-doped Heisenberg chains [J].
Schnack, J .
EUROPEAN PHYSICAL JOURNAL B, 2005, 45 (03) :311-315