Taichi Terashima

dHvA Effect Study of Metamagnetic Transition in CeRu 2Si 2 II - The State above the Metamagnetic Transition

We have performed an extensive dHvA effect study of CeRu 2 Si 2 to gain more insight into the nature of the metamagnetic transition. The angular dependence of the dHvA frequencies confirms the transition of the Fermi surfaces from those of the itinerant f electron below the metamagnetic transition field ( H m ) to those of the localized f electron above H m . The field dependence of the frequencies and effective masses are measured for all the frequencies observed with fields parallel to [001]. A waveform analysis suggests that the Fermi surfaces of the up and down spin electrons are similar in size, whereas the effective masses are significantly different. The amplitudes of the dHvA oscillations and their field dependence are anomalous above H m , implying that the dHvA oscillations above H m may possibly come from a state which is not well developed near H m .

De Hass - van Alphen oscillations in the normal and superconducting states of the boro-carbide superconductor YNi2B2C

Abstract The de Hass - van Alphen (dHvA) measurements in the normal and mixed states of the boro-carbide superconductor YNi2B2C are reported. Five dHvA branches are observed in the normal state with magnetic fields in the (010) plane. They can be accounted for by the electronic band-structure calculation by Lee et al. A clear dHvA oscillation is also observed in the mixed state. The quasi-particle scattering rate in the mixed state is discussed in connection with the superconducting gap.

Global Phase Diagram of the Magnetic Field-Induced Organic Superconductors λ-(BETS)2FexGa1-xCl4

Organic alloys λ-(BETS) 2 Fe x Ga 1- x Cl 4 show superconductivity only under very high magnetic fields parallel to the conducting layer for x ≥0.47. As x decreases, the field induced superconducti...

Ferromagnetism vs paramagnetism and false quantum oscillations in lanthanum-doped CaB6

Magnetization and resistivity were measured as functions of temperature and magnetic field on two single crystals of CaB 6 and three of (Ca 0.995 La 0.005 )B 6 . One of the doped crystals exhibited...

Phase diagram of pressure-induced superconductivity in EuFe2As2probed by high-pressure resistivity up to 3.2 GPa

We have constructed a pressure

Fermi surface in KFe2As2determined via de Haas–van Alphen oscillation measurements

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Magnetic properties of incommensurate layer compounds, (CeS)1.2NbS2 and (CeS)0.6NbS2

temperature (

Three-dimensional fermi surface in θ-(BEDT-TTF)2I3

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Temperature Dependence of Giant Magnetoresistance in Co/Cu Superlattices.

) phase diagram of

Shubnikov–de Haas Effect and Angular-dependent Magnetoresistance in New Layered Organic Conductors ET3Cl(DFBIB) and ET3Br(pBIB)

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