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De Haas-van Alphen effect in UPt3 Reviewed

N Kimura, R Settai, Y Onuki, K Maezawa, H Aoki, H Harima

PHYSICA B 216 ( 3-4 ) 313 - 315 1996.1

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

We have done de Haas-van Alphen (dHvA) experiments in UPt3 and have observed at least three new branches, One of them is in the basal plane and the others are around the [0001] direction. The branch with a dHvA frequency of 2.7 x 10(7) Oe in the field along [0001] possesses a large mass of 40 m(0).

DOI： 10.1016/0921-4526(95)00503-X

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Spontaneous magnetization on the superconducting transition in UPt3 Reviewed

T Mamiya, H Kambara, T Yoshizumi, N Kimura, R Settai, E Yamamoto, Y Haga, Y Onuki

CZECHOSLOVAK JOURNAL OF PHYSICS 46 777 - 778 1996

Language：English Publishing type：Research paper (scientific journal) Publisher：CZECHOSLOVAK JNL OF PHYSICS

Theories predict that spontaneous magnetization occurs in the superconducting B phase in UPt3 because of broken time-reversal symmetry. The strength of the spontaneous magnetization depends on whether it comes from spin degeneracy or orbital degeneracy. We measured the internal field due to the spontaneous magnetization on the superconducting transition to the B phase for a UPt3 sample in the magnetic fields very close to zero, using a SQUID magnetometer. The upper limit of the spontaneous internal field was 0.007 gauss. This result seems to favor the theory of the orbital degeneracy.

DOI： 10.1007/BF02583696

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FERMI SURFACES OF YBGA2 Reviewed

T YAMAZAKI, K MOTOKI, H SUGAWARA, T EBIHARA, N KIMURA, M TAKASHITA, J ITOH, H TOSHIMA, H IKEZAWA, R SETTAI, Y ONUKI

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 140 1239 - 1240 1995.2

Hall sensor applicable to cryogenic temperatures for magnetic fields up to 25 T Reviewed

A. Sawada, S. Sakatsume, T. Goto, S. Nakamura, H. Matsui, R. Settai, Y. Ohtani, K. Watanabe, A. Hoshi

Cryogenics 34 953 1994.12

SINGLE-CRYSTAL GROWTH AND ELECTRICAL-PROPERTIES OF CERH2 AND CEIR2 Reviewed

H SUGAWARA, T YAMAZAKI, J ITOH, M TAKASHITA, T EBIHARA, N KIMURA, P SVOBODA, R SETTAI, Y ONUKI, H SATO, S UJI, H AOKI

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 63 ( 4 ) 1502 - 1507 1994.4

Conventional magnetic field sensor Reviewed

S. Sakatsume, T. Goto, S. Nakamura, H. Matsui, R. Settai, Y. Ohtani, A. Sawada, K. Watanabe, A. Hosi

Sci. Rep. RITU A 38 322 - 329 1993.12

DILUTION REFRIGERATOR FOR MEASUREMENT OF THE ACOUSTIC DEHAAS-VANALPHEN EFFECT Reviewed

T GOTO, S SAKATSUME, A SAWADA, H MATSUI, R SETTAI, S NAKAMURA, Y OHTANI, H GOTO, Y OHE, A TAMAKI, Y FUDA, K ABE, Y YAMATO, T FUJIMURA

CRYOGENICS 32 ( 10 ) 902 - 907 1992

Language：English Publishing type：Research paper (scientific journal) Publisher：BUTTERWORTH-HEINEMANN LTD

A dilution refrigerator with a cooling power of 500 muW/100 mK combined with a super-conducting magnet of up to 13.5 T has been developed for measurement of the acoustic de Haas - van Alphen effect for heavy fermion compounds. A sample was immersed in a liquid He-3 - He-4 mixture in the tail of the mixing chamber. A one-circle goniometer with a spiral gear to change the sample orientation with respect to the magnetic field was driven by a superconducting stepping motor in the mixing chamber. The ultrasonic pulse was transmitted through the high frequency CuNi coaxial lines with an electric impedance of 50 OMEGA.

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ACOUSTIC DEHAAS-VANALPHEN EFFECT IN F-ELECTRON SYSTEMS Reviewed

R SETTAI, H MATSUI, Y OHE, T GOTO, T FUJIMURA, S SAKATSUME, Y ONUKI, F IGA, M KASAYA

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 90-1 446 - 448 1990.12

Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER SCIENCE BV

The acoustic de Haas-van Alphen effects of CeCu2, YCu2 and UB12 have been observed by the sound velocity measurements. The angular variation of the frequencies and the mass enhancement effect are determined.

DOI： 10.1016/S0304-8853(10)80160-X

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