High-field de Haas–van Alphen studies of the Fermi surfaces ofLaMIn5(M=Co,Rh,Ir)

We have developed a new magneto-optical measurement system with a rotational cavity. It consists of a millimeter vector network analyzer and a 15T solenoid type superconducting magnet and it can go down to 1.5 K. The rotational cavity can be used in the transmission configuration and the rotation can be performed up to almost 360 degrees in 1 degree precision. We will show the magneto-optical measurement results of β"-(BEDT-TTF)(TCNQ) using our new system. We observe the quasi-two-dimensional periodic orbit resonance (POR) in β"-(BEDT-TTF) (TCNQ). The Fermi surfaces of this system will be discussed.

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High-field phase transitions and Fermi surfaces in the organic conductor α-(BEDT-TTF)2KHg(SCN)4: Influence of the magnetic breakdown on evaluation of the effective mass and the scattering time

Physica B Condensed Matter ◽

10.1016/s0921-4526(97)00921-6 ◽

1998 ◽

Vol 246-247 ◽

pp. 303-306 ◽

Cited By ~ 8

Author(s):

T Sasaki ◽

W Biberacher ◽

T Fukase

Keyword(s):

Phase Transitions ◽

Effective Mass ◽

High Field ◽

Organic Conductor ◽

Field Phase ◽

Fermi Surfaces ◽

Magnetic Breakdown ◽

Scattering Time

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High field Fermi surfaces studied by AMRO in η-Mo4O11

Physica E Low-dimensional Systems and Nanostructures ◽

10.1016/s1386-9477(02)00964-5 ◽

2003 ◽

Vol 18 (1-3) ◽

pp. 198-199 ◽

Cited By ~ 1

Author(s):

Kokichi Oshima ◽

Takashi Kambe ◽

Yoshio Nogami ◽

Takahiko Sasaki

Keyword(s):

High Field ◽

Fermi Surfaces

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Study of segregation in La1.8Sr0.2CuO4 superconductor by STEM-EDS microanalysis

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100125294 ◽

1987 ◽

Vol 45 ◽

pp. 54-55

Author(s):

T. F. Kelly ◽

P. J. Lee ◽

E. E. Hellstrom ◽

D. C. Larbalestier

Keyword(s):

Rare Earth ◽

High Field ◽

Transport Current ◽

Total Thickness ◽

New Class ◽

Ceramic Superconductors ◽

Current Densities ◽

Group Ii ◽

Eds Microanalysis

Recently there has been much excitement over a new class of high Tc (>30 K) ceramic superconductors of the form A1-xBxCuO4-x, where A is a rare earth and B is from Group II. Unfortunately these materials have only been able to support small transport current densities 1-10 A/cm2. It is very desirable to increase these values by 2 to 3 orders of magnitude for useful high field applications. The reason for these small transport currents is as yet unknown. Evidence has, however, been presented for superconducting clusters on a 50-100 nm scale and on a 1-3 μm scale. We therefore planned a detailed TEM and STEM microanalysis study in order to see whether any evidence for the clusters could be seen.A La1.8Sr0.2Cu04 pellet was cut into 1 mm thick slices from which 3 mm discs were cut. The discs were subsequently mechanically ground to 100 μm total thickness and dimpled to 20 μm thickness at the center.

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