K
K. Maiwa
Researcher at Tohoku University
Publications - 5
Citations - 163
K. Maiwa is an academic researcher from Tohoku University. The author has contributed to research in topics: Dislocation & Supersaturation. The author has an hindex of 5, co-authored 5 publications receiving 158 citations.
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Activities of spiral growth hillocks on the (111) faces of barium nitrate crystals growing in an aqueous solution
TL;DR: In situ measurements of normal growth rates R, slopes p, and step advancing rates v = R / p of the spiral growth hillocks generated from two types of dislocations, screw (b = [111]) and mixed (b= 〈110〉), were made on the (111) faces of Ba(NO3)2 crystals growing from an aqueous solution at different flow velocity, u as discussed by the authors.
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Growth and perfection of crystals from aqueous solution: Case studies on barium nitrate and K-alum
TL;DR: Growth, dissolution and perfection of crystals from aqueous solution have been investigated using barium nitrate, Ba(NO 3 ) 2, and K-alum, KAl(SO 4 ) 2 · 12H 2 O, crystals as representative cases.
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Growth induced lattice defects in Ba(NO3)2 crystals
TL;DR: In this paper, combined X-ray topographic and surface microtopographic studies were made on barium nitrate crystals grown from the aqueous solution at known supersaturations on etched and unetched seeds.
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Observation of screw and mixed dislocations in barium nitrate crystals by means of birefringence and x-ray topography
TL;DR: In this paper, X-ray topographic observations showed that three types of dislocations can be observed in a (111) growth sector of a barium nitrate crystal, i.e., edge dislocation with b = 〈110〉, mixed dislocational with b < 0, and screw dislocated with b ≥ 0, which can be distinguished by polarizing microscopy.
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Birefringence images of screw dislocations viewed end‐on in cubic crystals
TL;DR: In this paper, the expressions for the intensity distribution in birefringence images and computer-simulated images of a straight, pure screw dislocation with Burgers vector viewed end-on in cubic crystals have been obtained for the first time by considering the anisotropy of both elastic and photoelastic properties of the material.