Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides

Sugiyama, J.; Nozaki, H.; Ikedo, Y.; Mukai, K.; Andreica, D.; Amato, A.; Brewer, J. H.; Ansaldo, E. J.; Morris, G. D.; Takami, T.; Ikuta, H.

doi:http://dx.doi.org/10.1103/PhysRevLett.96.197206

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Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides

http://hdl.handle.net/2237/8880

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	PhysRevLett_96-197206.pdf (379.3 kB)

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学術雑誌論文 / Journal Article(1)

公開日

2007-10-24

タイトル

Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides

著者

Sugiyama, J.
Nozaki, H.
Ikedo, Y.
Mukai, K.
Andreica, D.
Amato, A.
Brewer, J. H.

Ansaldo, E. J.

Morris, G. D.

Takami, T.
Ikuta, H.

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内容記述

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.

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American Physical Society

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eng

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http://purl.org/coar/resource_type/c_6501

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2021-03-01 12:23:14.599527

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Evidence of Two Dimensionality in Quasi-One-Dimensional Cobalt Oxides

× Sugiyama, J.

× Nozaki, H.

× Ikedo, Y.

× Mukai, K.

× Andreica, D.

× Amato, A.

× Brewer, J. H.

× Ansaldo, E. J.

× Morris, G. D.

× Takami, T.

× Ikuta, H.

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