@article{oai:nagoya.repo.nii.ac.jp:00007198,
 author = {Sugiyama, J. and Nozaki, H. and Ikedo, Y. and Mukai, K. and Andreica, D. and Amato, A. and Brewer, J. H. and Ansaldo, E. J. and Morris, G. D. and Takami, T. and Ikuta, H.},
 issue = {19},
 journal = {PHYSICAL REVIEW LETTERS},
 month = {May},
 note = {The quasi-one-dimensional (Q1D) cobalt oxides A_{n+2}Co_{n+1}O{3n+3} (A = Ca, Sr, and Ba, n = 1-∞) were investigated by muon-spin spectroscopy under applied pressures of up to 1.1 GPa. The relationship between the onset Néel temperature T^on _N and the interchain distance (d_ic), which increases monotonically with n, is well fitted by the formula T_N/T_N,0 =(1-d_ic/d_ic,0)^β ; here T^on _N ～ 100 K for Ca3Co2O6 (n = 1) and ～15 K for BaCoO3 (n=∞) at ambient P. The T^on _N - d_ic curve also predicts a large P dependence of T_N for the compounds with n ≧ 5, i.e., in the vicinity of d_ic,0, while the n = 1–4 compounds show only a very small effect. Indeed, our high-pressure μ+SR results show that T_N of BaCoO3 is enhanced by P with a slope of 2.2 K/GPa, whereas no detectable changes by P for both Ca3Co2O6 and Sr4Co3O9 (n =2). This clearly confirms the role of the 2D-antiferromagnetic interaction on T^on _N in the Q1D cobalt oxides.},
 pages = {197206--197206},
 title = {Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides},
 volume = {96},
 year = {2006}
}