S. A. Sunshine | Researchain

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Journal of Materials Research | 1997

Single crystal growth of cuprates from hydroxide fluxes

S. A. Sunshine; T. Siegrist; L. F. Schneemeyer

Barium and potassium hydroxide have been investigated as fluxes for the growth of cuprate single crystals. The relatively high solubility of transition metals and lanthanoids in these salt fluxes at moderate temperatures allows significant lowering of the growth temperatures required for many phases. Also, phases not stable at high temperatures become accessible. Two new cuprates have been prepared in the Ba–Ca–Cu–O and Ba–Y–Cu–O systems from a Ba(OH)2 · H2O flux. The compounds Ba3(Y0.23Cu0.77)2O5.78 and Ba3(Ca0.24Cu0.76)2O4.43 crystallize in a tetragonal (space group I4/mmm) oxygen deficient Sr3Ti2O7-type structure with lattice parameters a = 4.069(2) A, 4.022(1) A and c = 21.61(2) A, 21.63(2) A, respectively. The compound (Ba0.92Sr0.08) (Ca0.38Cu0.62)O2.1 crystallizes with a doubled perovskite unit cell along all three axes, a = 8.116(4) A. In addition, single crystals of Ba2Ycu3O7–δ have been prepared from a KOH flux at 750 °C.

Physical Review Letters | 1987

Bulk superconductivity at 91 K in single-phase oxygen-deficient perovskite Ba2YCu

R. J. Cava; B. Batlogg; R. B. van Dover; D. W. Murphy; S. A. Sunshine; T. Siegrist; J. P. Remeika; E. A. Rietman; S. M. Zahurak; G. P. Espinosa

Physical Review B | 1988

Structural and physical properties of the metal (M) substituted YBa2Cu3-xMxO7-y perovskite

Jean-Marie Tarascon; P. Barboux; P.F. Miceli; L. H. Greene; G. W. Hull; M. Eibschutz; S. A. Sunshine

Physical Review B | 1988

Structure and physical properties of single crystals of the 84-K superconductor Bi2.2Sr2Ca0.8Cu2O8+ delta.

S. A. Sunshine; T. Siegrist; L. F. Schneemeyer; D. W. Murphy; R. J. Cava; B. Batlogg; R. B. van Dover; R. M. Fleming; S. H. Glarum; S. Nakahara; R.C. Farrow; J. J. Krajewski; S. M. Zahurak; J. V. Waszczak; J. H. Marshall; P. Marsh; L. W. Rupp; W.F. Peck

Physical Review Letters | 1987

New superconducting cuprate perovskites.

D. W. Murphy; S. A. Sunshine; R. B. van Dover; R. J. Cava; B. Batlogg; S. M. Zahurak; L. F. Schneemeyer

Physical Review B | 1987

Crystal structure of the high-Tc superconductor Ba2YCu3O9- delta.

T. Siegrist; S. A. Sunshine; D. W. Murphy; R. J. Cava; S. M. Zahurak

Nature | 1988

Growth of superconducting single crystals in the Bi–Sr–Ca–Cu–O system from alkali chloride fluxes

L. F. Schneemeyer; R. B. van Dover; S. H. Glarum; S. A. Sunshine; R. M. Fleming; B. Batlogg; T. Siegrist; J. H. Marshall; J. V. Waszczak; L. W. Rupp

Physical Review B | 1988

Ba/sub 2-//sub x/La/sub x/YCu/sub 3/O/sub 7//sub +- //sub delta/ perovskite compounds: Crystal chemistry

R. J. Cava; B. Batlogg; R. M. Fleming; S. A. Sunshine; A. P. Ramirez; E. A. Rietman; S. M. Zahurak; R. B. van Dover

Physical Review Letters | 1987

Isotope Effect in the High-T_{c} Superconductors Ba_{2}YCu_{3}O_{7} and Ba_{2}EuCu_{3}O_{7}

Bertram Batlogg; R. J. Cava; A. Jayaraman; Robert Bruce van Dover; G. A. Kourouklis; S. A. Sunshine; D. W. Murphy; L. W. Rupp; H. S. Chen; Andrew White; Kenneth T. Short; A. M. Mujsce; E. A. Rietman

Physical Review B | 1988