Positron lifetime measurements on neutron-irradiated InP crystals

Navarro, Francisco Javier Navarro; Damonte, L. C.; Marı́, B.; Ferrero, J.L.

doi:10.1063/1.362637

Cited by 6 publications

(3 citation statements)

References 14 publications

(23 reference statements)

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“…Nevertheless, with the data presented in Fig. 1, the B TM found is not constant and it's far from the value of B ϭ247Ϯ1 ps, 11 obtained in previous measurements. This can be seen on Fig.…”

Section: Discussioncontrasting

confidence: 81%

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Observation of Fe-related defects in neutron irradiated semi-insulating InP

Marı́

Hernández-Fenollosa

Navarro

2001

Journal of Applied Physics

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Articles you may be interested inComplementary infrared and transmission electron microscopy studies of the effect of high temperature-high pressure treatments on oxygen-related defects in irradiated silicon Effects of annealing on the electrical properties of Fe-doped InP J. Appl. Phys. 86, 981 (1999); 10.1063/1.370835 Photoluminescence study of the defects induced by neutron irradiation and rapid annealing in semi-insulating GaAsOptical absorption and positron lifetime measurements have been performed on Fe-doped semi-insulating InP single crystals irradiated with thermal neutrons in a wide dose range from 0.1 to 2.7ϫ10 17 n cm Ϫ2 . Two lifetimes were found: 1 ϭ210 ps is constant in all the irradiation range; and 2 ϭ340 ps reaches an intensity of almost 40% at the higher fluence used. When comparing these results with those obtained on unintentionally doped InP, a large increase of the longest lifetime is observed, from 300 ps in the nondoped InP to 340 ps in the semi-insulating InP. The increase of the second lifetime in InP:Fe means that the positron traps are less attractive to positrons. These positron traps have been associated to a complex defect generated by the main neutron-originated defect, the indium vacancy, and the clusters or interstitial atoms of Fe. The optical absorption spectra show a background absorption related to Fe precipitates in as-grown InP:Fe. This background absorption disappears after neutron irradiation, suggesting the destruction of Fe precipitates by the energetic particles generated in the transmutation process of 115 In.

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Section: Discussioncontrasting

confidence: 81%

“…An experimental value of 247Ϯ2 ps is found, close to that obtained in the nondoped InP. 11 Figure 1 shows the evolution of the lifetime parameters ( 2 ,I 2 ) in the InP and InP:Fe samples against the expected tin concentration following neutron irradiation. All measurements were performed at room temperature.…”

Section: Resultssupporting

confidence: 72%

Observation of Fe-related defects in neutron irradiated semi-insulating InP

Marı́

Hernández-Fenollosa

Navarro

2001

Journal of Applied Physics

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“…There are also some limited results of radiation-induced defects in InP by the positron annihilation technique, but often light particles, such as electrons [12,13] and neutrons [14], were used for irradiation.…”

Section: Introductionmentioning

confidence: 99%

Vacancies and negative ions in as-grown and ion-bombarded p-InP(Zn) observed by positron annihilation

Chen¹,

Wang²

1999

Semicond. Sci. Technol.

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Defects in as-grown and ion-bombarded p-InP crystals have been investigated by positron lifetime measurements. The result showed that indium vacancies existed in as-grown p-InP. In addition, Zn impurities Zn − In were also observed, which are negative and act as shallow trapping centres at low temperatures. Ion bombardment at lower dose introduced some monovacancies, and with increasing ion dose, divacancies were also observed, which coexisted with monovacancies. The temperature experiment showed that antisite defects were also produced upon bombardment, which we attribute to the negatively charged In P antisites.

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Defects in NTD InP probed by positron annihilation spectroscopy

Xiang-e

et al. 1999

Wuhan Univ. J. Nat. Sci.

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Positron lifetime measurements on neutron-irradiated InP crystals

Cited by 6 publications

References 14 publications

Observation of Fe-related defects in neutron irradiated semi-insulating InP

Observation of Fe-related defects in neutron irradiated semi-insulating InP

Vacancies and negative ions in as-grown and ion-bombarded p-InP(Zn) observed by positron annihilation

Defects in NTD InP probed by positron annihilation spectroscopy

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