Crystal growth and superconductivity of (La1-xCa x)2CaCu2O6+δ

G. D. Gu; M. Hücker; Y. J. Kim; J. M. Tranquada; H. Dabkowska; G. M. Luke; T. Timusk; B. D. Gaulin; Q. Li; A. R. Moodenbaugh

doi:10.1016/j.jpcs.2005.10.153

Crystal growth and superconductivity of (La_1-xCa _x)₂CaCu₂O_6+δ

G. D. Gu
, M. Hücker
, Y. J. Kim
, J. M. Tranquada
, H. Dabkowska
, G. M. Luke
, T. Timusk
, B. D. Gaulin
, Q. Li
, A. R. Moodenbaugh

Physics and Astronomy

Stony Brook University

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

9 Scopus citations

Abstract

The effects of growth conditions and composition on the crystal growth of (La_1-xCa_x)₂CaCu₂O _6+δ (x=0.05-0.15) superconducting materials have been studied by using the floating zone method. A smooth solid-liquid growth interface of (La_1-xCa_x)₂CaCu₂O _6+δ (x=0.05-0.06) tended to break down into a cellular interface when the growth velocity was higher than 0.5 mm/h. When the solid-liquid interface became cellular, the single crystal size in an as-grown rod decreased abruptly and the as-grown rod was not single phase. Various sized CaO inclusions were found inside the as-grown single crystals of (La _1-xCa_x)₂CaCu₂O_6+δ (x≥0.075). Cubic centimeter size single crystals were successfully grown for both (La_0.95Ca_0.05)₂CaCu₂O _6+δ and (La_0.94Ca_0.06) ₂CaCu₂O_6+δ. The as-grown single crystals of (La_1-xCa_x)₂CaCu₂O_6+y under 1 bar pressure of oxygen were not superconducting. The superconducting temperature of the (La_1-xCa_x)₂CaCu ₂O_6+y crystals grown at 11 bar oxygen is 28 K. The application of high pressure oxygen during crystal growth is an effective method to get bulk superconductivity in the crystals.

Original language	English
Pages (from-to)	431-434
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jpcs.2005.10.153
State	Published - Jan 2006

Keywords

A.oxide
A.superconductor

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10.1016/j.jpcs.2005.10.153

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title = "Crystal growth and superconductivity of (La1-xCa x)2CaCu2O6+δ",

abstract = "The effects of growth conditions and composition on the crystal growth of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.15) superconducting materials have been studied by using the floating zone method. A smooth solid-liquid growth interface of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.06) tended to break down into a cellular interface when the growth velocity was higher than 0.5 mm/h. When the solid-liquid interface became cellular, the single crystal size in an as-grown rod decreased abruptly and the as-grown rod was not single phase. Various sized CaO inclusions were found inside the as-grown single crystals of (La 1-xCax)2CaCu2O6+δ (x≥0.075). Cubic centimeter size single crystals were successfully grown for both (La0.95Ca0.05)2CaCu2O 6+δ and (La0.94Ca0.06) 2CaCu2O6+δ. The as-grown single crystals of (La1-xCax)2CaCu2O6+y under 1 bar pressure of oxygen were not superconducting. The superconducting temperature of the (La1-xCax)2CaCu 2O6+y crystals grown at 11 bar oxygen is 28 K. The application of high pressure oxygen during crystal growth is an effective method to get bulk superconductivity in the crystals.",

keywords = "A.oxide, A.superconductor",

author = "Gu, \{G. D.\} and M. H{\"u}cker and Kim, \{Y. J.\} and Tranquada, \{J. M.\} and H. Dabkowska and Luke, \{G. M.\} and T. Timusk and Gaulin, \{B. D.\} and Q. Li and Moodenbaugh, \{A. R.\}",

year = "2006",

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doi = "10.1016/j.jpcs.2005.10.153",

language = "English",

volume = "67",

pages = "431--434",

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T1 - Crystal growth and superconductivity of (La1-xCa x)2CaCu2O6+δ

AU - Gu, G. D.

AU - Hücker, M.

AU - Kim, Y. J.

AU - Tranquada, J. M.

AU - Dabkowska, H.

AU - Luke, G. M.

AU - Timusk, T.

AU - Gaulin, B. D.

AU - Li, Q.

AU - Moodenbaugh, A. R.

PY - 2006/1

Y1 - 2006/1

N2 - The effects of growth conditions and composition on the crystal growth of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.15) superconducting materials have been studied by using the floating zone method. A smooth solid-liquid growth interface of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.06) tended to break down into a cellular interface when the growth velocity was higher than 0.5 mm/h. When the solid-liquid interface became cellular, the single crystal size in an as-grown rod decreased abruptly and the as-grown rod was not single phase. Various sized CaO inclusions were found inside the as-grown single crystals of (La 1-xCax)2CaCu2O6+δ (x≥0.075). Cubic centimeter size single crystals were successfully grown for both (La0.95Ca0.05)2CaCu2O 6+δ and (La0.94Ca0.06) 2CaCu2O6+δ. The as-grown single crystals of (La1-xCax)2CaCu2O6+y under 1 bar pressure of oxygen were not superconducting. The superconducting temperature of the (La1-xCax)2CaCu 2O6+y crystals grown at 11 bar oxygen is 28 K. The application of high pressure oxygen during crystal growth is an effective method to get bulk superconductivity in the crystals.

AB - The effects of growth conditions and composition on the crystal growth of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.15) superconducting materials have been studied by using the floating zone method. A smooth solid-liquid growth interface of (La1-xCax)2CaCu2O 6+δ (x=0.05-0.06) tended to break down into a cellular interface when the growth velocity was higher than 0.5 mm/h. When the solid-liquid interface became cellular, the single crystal size in an as-grown rod decreased abruptly and the as-grown rod was not single phase. Various sized CaO inclusions were found inside the as-grown single crystals of (La 1-xCax)2CaCu2O6+δ (x≥0.075). Cubic centimeter size single crystals were successfully grown for both (La0.95Ca0.05)2CaCu2O 6+δ and (La0.94Ca0.06) 2CaCu2O6+δ. The as-grown single crystals of (La1-xCax)2CaCu2O6+y under 1 bar pressure of oxygen were not superconducting. The superconducting temperature of the (La1-xCax)2CaCu 2O6+y crystals grown at 11 bar oxygen is 28 K. The application of high pressure oxygen during crystal growth is an effective method to get bulk superconductivity in the crystals.

KW - A.oxide

KW - A.superconductor

UR - https://www.scopus.com/pages/publications/33645029941

U2 - 10.1016/j.jpcs.2005.10.153

DO - 10.1016/j.jpcs.2005.10.153

M3 - Article

SN - 0022-3697

VL - 67

SP - 431

EP - 434

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 1-3

ER -

Crystal growth and superconductivity of (La_1-xCa _x)₂CaCu₂O_6+δ

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Keywords

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