論文 - 辺土　正人

De Haas-van Alphen effect in RFe4P12 (R = La and Nd)

Sugawara H, Abe Y, Aoki Y, Sato H, Hedo M, Settai R, Onuki Y

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS   177   359 - 360   1998年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Anomalous field dependence of magnetic penetration depth in the vortex state of CeRu2 probed by muon spin rotation

Yamashita A, Ishii K, Yokoo T, Akimitsu J, Hedo M, Inada Y, Onuki Y, Yamamoto E, Haga Y, Kadono R

PHYSICAL REVIEW LETTERS   79 ( 19 ) 3771 - 3774   1997年11月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

AC and DC magnetisation studies of peak effect in a clean crystal of CeRu2

Patil NG, Banerjee SS, Saha S, Ghosh K, Ramakrishnan S, Bhattacharya S, Grover AK, Rao TVC, Ravikumar G, Mishra PK, Sahni VC, Yamamoto E, Haga Y, Hedo M, Inada Y, Onuki Y

PHYSICA C   282   2043 - 2044   1997年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Elastic properties of CeRu2

Wolf, B; Hinkel, C; Holtmeier, S; Wichert, D; Kouroudis, I; Bruls, G; Luthi, B; Hedo, M; Inada, Y; Yamamoto, E; Haga, Y; Onuki, Y

JOURNAL OF LOW TEMPERATURE PHYSICS ( PLENUM PUBL CORP )  107 ( 3-4 ) 421 - 441   1997年05月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

We present data of the elastic properties of the Laves phase compound CeRu2 in the normal and superconducting state obtained from ultrasound measurements. In the temperature range between the superconducting transition temperature of 6.1 K and 300 K we used a deformation potential coupling approach to describe the temperature dependence of the elastic constants. The elastic anomalies in the superconducting state are characterised with the model of thermally assisted flux flow (TAFF). This enables us to construct a detailed superconducting B-T phase diagram including the vortex dynamics and interpret the peak effect region. Especially the ultrasonic measurements exhibit clearly the connectin between the normal state and the superconducting properties. They slow that structural fluctuations have strong effects on the superconductivity and on the vortex dynamics.

• この論文にアクセスする

  DOI

Effect of field inhomogeneity on the magnetisation measurements in the peak effect region of CeRu2 superconductor

Ravikumar G, Rao TVC, Mishra PK, Sahni VC, Saha S, Banerjee SS, Patil NG, Grover AK, Ramakrishnan S, Bhattacharya S, Yamamoto E, Haga Y, Hedo M, Inada Y, Onuki Y

PHYSICA C   276 ( 1-2 ) 9 - 17   1997年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

dHvA oscillation in the superconducting mixed state of CeRu2

Inada Y, Hedo M, Ishida T, Yamamoto E, Haga Y, Onuki Y

PHYSICA B   230   387 - 390   1997年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Giant lattice softening in the normal state of CeRu2

Suzuki, T; Goshima, H; Sakita, S; Fujita, T; Hedo, M; Inada, Y; Yamamoto, E; Haga, Y; Onuki, Y

PHYSICA B ( ELSEVIER SCIENCE BV )  230   176 - 178   1997年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

Elastic moduli of high-quality single-crystalline CeRu2 have been measured between 2 and 300 K by an ultrasonic technique. Both shear moduli of (C-11 - C-12)/2 and C-44 show a giant softening without structural transition. In contrast to the shear moduli, the bulk modulus C-B indicates a normal temperature dependence without the anomalous softening. These results reveal that there exists a remarkable structural fluctuation corresponding to shearing strain in the normal state of CeRu2. The analysis taking account of the deformation potential coupling between the strain and an electronic energy band demonstrates that degenerate and peaked density of states is responsible for the softening.

• この論文にアクセスする

  DOI

Anomalous pinning in superconductors with strong Pauli paramagnetism

Onuki Y, Hedo M, Inada Y, Settai R, Sugawara H, Aoki Y, Sato H, Deppe M, Gegenwart P, Geibel C, Lang M, Luhmann T, Modler R, Weiden M, Steglich F, Paulsen C, Tholence JL, Sato N, Komatsubara T, Tachiki M, Takahashi S

PHYSICA B-CONDENSED MATTER   223-24 ( 1-4 ) 28 - 32   1996年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Anomalous pinning in superconductors with strong Pauli paramagnetism

Y Onuki, M Hedo, Y Inada, R Settai, H Sugawara, Y Aoki, H Sato, M Deppe, P Gegenwart, C Geibel, M Lang, T Luhmann, R Modler, M Weiden, F Steglich, C Paulsen, JL Tholence, N Sato, T Komatsubara, M Tachiki, S Takahashi

PHYSICA B-CONDENSED MATTER ( ELSEVIER SCIENCE BV )  223-24 ( 1-4 ) 28 - 32   1996年06月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

The results of the magnetization, magnetostriction and AC-susceptibility experiments are presented for both the antiferromagnetic heavy-Fermion superconductor UPd(2)Al(3) and the valence fluctuation compound CeRu(2). For (H > 10 kOe). These results are discussed on the basis of a generalized Fulde-Ferrell-Larkin-Ovchinnikov superconducting state.

• この論文にアクセスする

  DOI

de Haas-van Alphen oscillation in both normal and superconducting mixed states of CeRu2

Hedo M, Inada Y, Ishida T, Yamamoto E, Haga Y, Onuki Y, Higuchi M, Hasegawa A

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN   64 ( 12 ) 4535 - 4539   1995年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

FIELD-INDUCED SUPERCONDUCTIVITY OF CERU(2)

YAGASAKI, K; HEDO, M; NAKAMA, T; SAKAI, E; NIKI, H

PHYSICA B-CONDENSED MATTER ( Physica B: Physics of Condensed Matter )  194 ( PART 2 ) 2089 - 2090   1994年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

• この論文にアクセスする

  DOI