Hydrogen Extraction Activation Energy from D<sub>2</sub>
                  <sup>+</sup>-Implanted Magnetic Bubble Garnet

Furuya, Kenichi; Suzuki, H.; Kimura, Tadashi; Uematsu, K.; Shin, Jae-Suk; Imura, R.

doi:10.1143/jjap.29.l481

Jpn. J. Appl. Phys.

1990

DOI: 10.1143/jjap.29.l481

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Hydrogen Extraction Activation Energy from D₂ ⁺-Implanted Magnetic Bubble Garnet

Kenichi Furuya

H. Suzuki

Tadashi Kimura

et al.

Abstract: Deuterium in D2 +-implanted magnetic garnet films was extracted by means of thermal desorption mass spectrometry and found to be a form of D2O at 360°C in vacuo. The overall activation energy for extraction was measured as 1.62 eV for D2O and 1.04 eV for DHO. The effect of the SiO2 overlayer was also discussed.

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Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Hirotsune¹,

Masuda²,

Kimura³

et al. 1993

Jpn. J. Appl. Phys.

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Thermal extraction behavior of He and D from He+-implanted yttrium iron garnet (Y3Fe5O12 or YIG) thin films annealed in D2 and activation energies of He and D in each trapping state have been investigated by means of a thermal desorption mass spectrometric (TDS) technique in order to clarify the effect of hydrogen on the effective anisotropy field change induced by ion implantation followed by D2 annealing. Four trapping states of He in He+-implanted YIG were observed when it was annealed under T a=320°C at a constant pressure of 760 Torr. The residual He atoms shifted to stabler states when it was annealed at above T a=350°C. Two trapping states of diffused D atoms which were extracted as a form of D2O were observed for two kinds of YIG samples annealed in D2 atmosphere. The relationship between effective anisotropy field change induced by ion implantation and the thermal extraction behavior of He and D was discussed against the annealing temperature.

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Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Hirotsune¹,

Masuda²,

Kimura³

et al. 1993

Jpn. J. Appl. Phys.

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Depth and State Analyses of Deuterium and Helium in D₂-Annealed He⁺-Implanted Yttrium Iron Garnet

Furuya¹,

Matsushita²,

Aratani³

et al. 1995

Jpn. J. Appl. Phys.

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An analogy is drawn between impact ionization probability integrals and joint density of states integrals in radiative processes by consideration of the class of integrals:where D is constant, y an n-dimensional vector, and g andfscalar functions ofy. The special case f(Y) = c WIZ, I = 1 with or = 1 is considered and the critical point concept in radiative transitions is extended to six dimensions, some details of these integrations being given, and explicit expressions for the impact ionization probability per unit time discussed.The approach of Hill and Landsberg to the calculation of the Auger rate in indirect materials is adapted to the calculation of impact ionization thresholds for any parabolic band structure. Two classes of threshold are identified. In class ct thresholds arise away from the extrema due to energy and momentum constraints. In class p thresholds occur at extrema of the band contamng the hot carrier. Various special cases are considered and the links with previously published results reviewed.The analogy between radiative and Auger processes previously drawn by Landsberg is used to extend the usual classification of van Hove singularities to a classification of impact ionization 'thresholds' (in the general sense of thresholds, anti-thresholds and saddle-point thresholds), which depends upon the effective masses. This classification is completed by the identification of two further subgroups of transitions, the criterion being whether or not there is an impact ionization 'window' in terms ofenergies. Simple examples of anti-thresholds are constructed.

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Hydrogen Extraction Activation Energy from D₂ ⁺-Implanted Magnetic Bubble Garnet

Cited by 2 publications

References 3 publications

Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Depth and State Analyses of Deuterium and Helium in D₂-Annealed He⁺-Implanted Yttrium Iron Garnet

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Hydrogen Extraction Activation Energy from D2 +-Implanted Magnetic Bubble Garnet

Cited by 2 publications

References 3 publications

Thermal Extraction Behavior of He and D from He+-Implanted Yttrium Iron Garnet Annealed in D2

Thermal Extraction Behavior of He and D from He+-Implanted Yttrium Iron Garnet Annealed in D2

Depth and State Analyses of Deuterium and Helium in D2-Annealed He+-Implanted Yttrium Iron Garnet

Contact Info

Product

Resources

About

Hydrogen Extraction Activation Energy from D₂ ⁺-Implanted Magnetic Bubble Garnet

Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Thermal Extraction Behavior of He and D from He⁺-Implanted Yttrium Iron Garnet Annealed in D₂

Depth and State Analyses of Deuterium and Helium in D₂-Annealed He⁺-Implanted Yttrium Iron Garnet