In situ observation and analysis of faceted crystal growth process in REBCO superconductive oxide

N. Mori; Y. Nakahara; K. Ogi; M. Mukaida

doi:10.1016/j.physc.2007.05.003

In situ observation and analysis of faceted crystal growth process in REBCO superconductive oxide

N. Mori
, Y. Nakahara
, K. Ogi
, M. Mukaida

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

To clarify the nucleation and growth process of 123 crystals, growth of faceted RE123 (REBa₂Cu₃O_7-X, RE = Nd, Sm, Gd, Y) crystals was observed in situ on MgO(1 0 0) by using high temperature optical microscope with zoom lens. RE123 crystals nucleated and grew at each undercooling (ΔT = 13-50 K). Growth rate (u) and incubation time (t_inc) for nucleation were obtained from the relationship between the position of faceted interface and time (t). u increased with increasing Δ T_r², where ΔT_r = ΔT/T_p, T_p was peritectic temperature. Nucleation rate (I_v) was obtained from the relationship between the number of nucleated crystals (n) and time. I_v increased with increasing of exp (- B / Δ T_r²), where B was a constant. Both u and I_v under a fixed ΔT increased with increasing T_p: u(Nd123) > u(Sm123) > u(Gd123) and I_v(Nd123) > I_v(Sm123) > I_v(Gd123) for T_p(Nd123) > T_p(Sm123) > T_p(Gd123) in Ar-1%O₂ atmosphere.

Original language	English
Pages (from-to)	330-334
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.05.003
Publication status	Published - Oct 1 2007

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2007.05.003

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title = "In situ observation and analysis of faceted crystal growth process in REBCO superconductive oxide",

abstract = "To clarify the nucleation and growth process of 123 crystals, growth of faceted RE123 (REBa2Cu3O7-X, RE = Nd, Sm, Gd, Y) crystals was observed in situ on MgO(1 0 0) by using high temperature optical microscope with zoom lens. RE123 crystals nucleated and grew at each undercooling (ΔT = 13-50 K). Growth rate (u) and incubation time (tinc) for nucleation were obtained from the relationship between the position of faceted interface and time (t). u increased with increasing Δ Tr2, where ΔTr = ΔT/Tp, Tp was peritectic temperature. Nucleation rate (Iv) was obtained from the relationship between the number of nucleated crystals (n) and time. Iv increased with increasing of exp (- B / Δ Tr2), where B was a constant. Both u and Iv under a fixed ΔT increased with increasing Tp: u(Nd123) > u(Sm123) > u(Gd123) and Iv(Nd123) > Iv(Sm123) > Iv(Gd123) for Tp(Nd123) > Tp(Sm123) > Tp(Gd123) in Ar-1\%O2 atmosphere.",

author = "N. Mori and Y. Nakahara and K. Ogi and M. Mukaida",

year = "2007",

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AU - Mori, N.

AU - Nakahara, Y.

AU - Ogi, K.

AU - Mukaida, M.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - To clarify the nucleation and growth process of 123 crystals, growth of faceted RE123 (REBa2Cu3O7-X, RE = Nd, Sm, Gd, Y) crystals was observed in situ on MgO(1 0 0) by using high temperature optical microscope with zoom lens. RE123 crystals nucleated and grew at each undercooling (ΔT = 13-50 K). Growth rate (u) and incubation time (tinc) for nucleation were obtained from the relationship between the position of faceted interface and time (t). u increased with increasing Δ Tr2, where ΔTr = ΔT/Tp, Tp was peritectic temperature. Nucleation rate (Iv) was obtained from the relationship between the number of nucleated crystals (n) and time. Iv increased with increasing of exp (- B / Δ Tr2), where B was a constant. Both u and Iv under a fixed ΔT increased with increasing Tp: u(Nd123) > u(Sm123) > u(Gd123) and Iv(Nd123) > Iv(Sm123) > Iv(Gd123) for Tp(Nd123) > Tp(Sm123) > Tp(Gd123) in Ar-1%O2 atmosphere.

AB - To clarify the nucleation and growth process of 123 crystals, growth of faceted RE123 (REBa2Cu3O7-X, RE = Nd, Sm, Gd, Y) crystals was observed in situ on MgO(1 0 0) by using high temperature optical microscope with zoom lens. RE123 crystals nucleated and grew at each undercooling (ΔT = 13-50 K). Growth rate (u) and incubation time (tinc) for nucleation were obtained from the relationship between the position of faceted interface and time (t). u increased with increasing Δ Tr2, where ΔTr = ΔT/Tp, Tp was peritectic temperature. Nucleation rate (Iv) was obtained from the relationship between the number of nucleated crystals (n) and time. Iv increased with increasing of exp (- B / Δ Tr2), where B was a constant. Both u and Iv under a fixed ΔT increased with increasing Tp: u(Nd123) > u(Sm123) > u(Gd123) and Iv(Nd123) > Iv(Sm123) > Iv(Gd123) for Tp(Nd123) > Tp(Sm123) > Tp(Gd123) in Ar-1%O2 atmosphere.

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M3 - Article

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JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.

ER -

In situ observation and analysis of faceted crystal growth process in REBCO superconductive oxide

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