5 papers
23Na NMR Studies of Non-superconducting and Superconducting Na0.35CoO2-1.3H2O (Tc < 1.8 and ~ 4.5 K)
H. Ohta, Y. Itoh, C. Michioka +1
We report 23Na NMR studies of the polycrystalline samples of bilayer hydrated cobalt oxides Na0.35CoO2-1.3H2O with the superconducting transition temperatures Tc < 1.8 and ~ 4.5 K.…
Quantum Critiality and Collective Effects in Low Dimensional Magnet CuGeO3 Probed by High Frequency EPR
S. V Demishev, A. V. Semeno, A. A. Pronin +8
For the CuGeO3 single crystals doped with 1% of Fe the quantum critical behavior in a wide temperature range 1-40 K is reported. The critical exponents for susceptibility along dif…
High Frequency EPR Spectroscopy of Germanium Cuprate. I. The Case of Doping with Cobalt
S. V. Demishev, A. V. Semeno, N. E. Sluchanko +7
Resonant magnetoabsorption spectra for CuGeO3 single crystals containing 2% of Co impurity are studied in the frequency range 60-360 GHz in magnetic field up to 16 T at temperature…
Magneto-optical probe of antiferromagnetic sub-phases in a pi- d electronic system
I. Rutel, S. Okubo, H. Ohta +3
The highly insulating antiferromagnetic phase of the magnetic- organic conductor lambda-(BETS)2FeCl4 has been probed by resonant mm wave methods vs. magnetic field, temperature, an…
Decay of spin-Peierls state in CuGeO3:Fe. The case of a strong disorder
S. V. Demishev, R. V. Bunting, A. A. Pronin +7
Influence of doping by iron impurity on spin-Peierls state in CuGeO3 is studied. ESR measurements for the frequency/temperature domain 60-450 GHz/ 1.8-300 K and specific heat data…