E. Ansaldo

activity

20032006

collaborators

Showing cond-mat.str-elShow all

8 papers · 1 filter

cond-mat.str-el2006

Incommensurate magnetic order in Ag $_{2}$ NiO $_{2}$

J. Sugiyama, Y. Ikedo, K. Mukai +6

The nature of the magnetic transition of the half-filled triangular antiferromagnet Ag $_{2}$ NiO $_{2}$ with $T_{N}$ =56K was studied with positive muon-spin-rotation and relaxation…

cond-mat.str-el2005

Static magnetic order in metallic K $_{0.49}$ CoO $_{2}$

J. Sugiyama, H. Nozaki, Y. Ikedo +8

By means of muon spin spectroscopy, we have found that K $_{0.49}$ CoO $_{2}$ crystals undergo successive magnetic transitions from a high-T paramagnetic state to a magnetic ordered sta…

cond-mat.str-el2005

Two dimensionality in quasi one-dimensional cobalt oxides

J. Sugiyama, H. Nozaki, J. H. Brewer +4

By means of muon spin rotation and relaxation ( $μ^{+}$ SR) techniques, we have investigated the magnetism of quasi one-dimensional (1D) cobalt oxides $A E_{n + 2}$ Co $_{n + 1}$ O $_{3 n + 3}$ ($…

cond-mat.str-el2003

A common behavior of thermoelectric layered cobaltites: incommensurate spin density wave states in [Ca $_{2}$ Co $_{4/3}$ Cu $_{2/3}$ O $_{4}$ ] $_{0.62}$ [CoO $_{2}$ ] and [Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ]

J. Sugiyama, J. H. Brewer, E. J. Ansaldo +6

Magnetism of a misfit layered cobaltite [Ca $_{2}$ Co $_{4/3}$ Cu $_{2/3}$ O $_{4}$ ] $_{x}^{RS}$ [CoO $_{2}$ ] ( $x \sim$ 0.62, RS denotes a rocksalt-type block) was investigated by a positive muo…

cond-mat.str-el2003

Electron correlation in the two-dimensional triangle lattice of Na $_{x}$ CoO $_{2}$

J. Sugiyama, J. H. Brewer, E. J. Ansaldo +4

Magnetism of layered cobaltites Na $_{x}$ CoO $_{2}$ with $x$ = 0.6 and 0.9 has been investigated by a positive muon spin rotation and relaxation ( $μ^{+}$ SR) spectroscopy together with magn…

cond-mat.str-el2003

Dome-shaped magnetic phase diagram of thermoelectric layered cobaltites

J. Sugiyama, J. H. Brewer, E. J. Ansaldo +7

Using muon spin spectroscopy we have found that, for both Na $_{x}$ CoO $_{2}$ (0.6 $\leq x \leq$ 0.9) and 3- and 4-layer cobaltites, a common low temperature magnetic state (which in som…

Incommensurate magnetic order in Ag2​NiO2​

Static magnetic order in metallic K0.49​CoO2​

Two dimensionality in quasi one-dimensional cobalt oxides

A common behavior of thermoelectric layered cobaltites: incommensurate spin density wave states in [Ca2​Co4/3​Cu2/3​O4​]0.62​[CoO2​] and [Ca2​CoO3​]0.62​[CoO2​]

Electron correlation in the two-dimensional triangle lattice of Nax​CoO2​

Dome-shaped magnetic phase diagram of thermoelectric layered cobaltites

Incommensurate magnetic order in Ag $_{2}$ NiO $_{2}$

Static magnetic order in metallic K $_{0.49}$ CoO $_{2}$

A common behavior of thermoelectric layered cobaltites: incommensurate spin density wave states in [Ca $_{2}$ Co $_{4/3}$ Cu $_{2/3}$ O $_{4}$ ] $_{0.62}$ [CoO $_{2}$ ] and [Ca $_{2}$ CoO $_{3}$ ] $_{0.62}$ [CoO $_{2}$ ]

Electron correlation in the two-dimensional triangle lattice of Na $_{x}$ CoO $_{2}$