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Journal Articles

X-ray diffuse scattering from carbon-ion-irradiated diamond

Sugai, Hiroyuki; Maeta, Hiroshi*; Matsumoto, Norimasa*; Kato, Teruo; Haruna, Katsuji*; Sataka, Masao; Ono, Fumihisa*

Physica Status Solidi (C), 4(8), p.2963 - 2966, 2007/07

 Times Cited Count:0 Percentile:0.02

The synthetic semiconductor diamond is potentially one of the best materials for electronic devices in severe environments like high temperature and radiation. We have studied the electrical transport properties of boron-doped synthetic semiconductor diamond and characterized natural and synthetic single crystal diamonds by measurements of the X-ray integrated scattering intensity, lattice parameter and diffuse scattering. The synthetic diamond were irradiated with 100 MeV carbon-ion at Tandem accelerator in JAEA-Tokai. After the irradiation, measurements of lattice parameters X-ray diffuse scattering were made at room temperature. The lattice parameters increased with ion fluence. The scattering intensity of the irradiated synthetic diamond diffuses asymmetrically to form a streak along the [-1 0 0] direction parallel to the reciprocal lattice vector. The result suggests that interstitial atoms and vacancies aggregate to form dislocation loop on the (100) plane.

Journal Articles

The Characterization of synthetic and natural single crystal diamonds by X-ray diffraction

Maeta, Hiroshi*; Matsumoto, Norimasa*; Haruna, Katsuji*; Saotome, Takao*; Ono, Fumihisa*; Sugai, Hiroyuki; Otsuka, Hideo; Ohashi, Kazutoshi*

Physica B; Condensed Matter, 376-377, p.283 - 287, 2006/04

 Times Cited Count:3 Percentile:18.02(Physics, Condensed Matter)

Natural and synthetic single crystal diamonds (type Ia, Ib, IIa and IIb) have been characterized by measurements of the X-ray integrated scattering intensity, lattice parameter and diffuse scattering. We found that the lattice parameter is smallest for natural diamond and largest for the B-doped diamond. We measured the diffuse scattering for (400) Bragg reflection for the four types of crystals. The scattering intensity of the natural crystals diffuses asymmetrically to form a streak along the [100] direction parallel to the reciprocal lattice vector. These results suggest the existence of the nitrogen atom platelets on (100) plane in the natural diamond. We also found the diffuse streaks along the [$$bar{1}$$00] direction for (400) Bragg reflection for the B-doped crystal, suggesting that boron atoms are likely to form precipitates on the (100) plane.

Journal Articles

X-ray diffuse scattering of quenched copper single crystals

Maeta, Hiroshi; Yamakawa, Koiji*; *; Haruna, K.*; Kato, Teruo; Ono, Fumihisa*

Nuclear Instruments and Methods in Physics Research B, 97, p.491 - 494, 1995/00

 Times Cited Count:0 Percentile:0.01(Instruments & Instrumentation)

no abstracts in English

Journal Articles

X-ray diffraction studies of self-ion irradiated synthetic single crystal diamond

Maeta, Hiroshi; Haruna, K.*; B.Lu*; Ono, Fumihisa*

Nuclear Instruments and Methods in Physics Research B, 80-81, p.1477 - 1479, 1993/00

 Times Cited Count:6 Percentile:57.52(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Thermal expansion measurements in a La$$_{1.85}$$Sr$$_{0.15}$$CuO$$_{4}$$ single crystal superconductor by X-ray diffraction

Maeta, Hiroshi; Kato, Teruo; Ono, Fumihisa*; Haruna, K.*; *; *

Physica C, 185-189, p.1383 - 1384, 1991/00

 Times Cited Count:6 Percentile:43.62(Physics, Applied)

no abstracts in English

Journal Articles

The Thermal expansion coefficient and Gruneisen parameter of InP crystal low temperatures

Haruna, K.*; Maeta, Hiroshi; Ohashi, K.*; Koike, T.*

J. Phys., C, 20(32), p.5275 - 5279, 1987/11

The thermal expansion of the lattice constante of InP crystal has been measured in the rage 4.2-300 K by the Bond method and teh rsults are shown graphically.

Journal Articles

The negative thermal expansion coefficient of GaP crystal at low temperature

*; ; *; *

J.Phys.,C, 19, p.5149 - 5154, 1986/00

no abstracts in English

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