Effect of pressure-induced oxygen ordering on the superconducting properties of GdBa2-ySryCu3Ox

V. P. D'yakonov; I. M. Fita; G. G. Levchenko; V. I. Markovich

Effect of pressure-induced oxygen ordering on the superconducting properties of GdBa_2-ySr_yCu₃O_x

V. P. D'yakonov, I. M. Fita, G. G. Levchenko, V. I. Markovich

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5 Scopus citations

Abstract

Magnetic measurements are used to investigate the effect of hydrostatic pressure up to 1 GPa on the superconducting transition temperature T_c and lower critical field H_c1 of the ceramic GdBa_2-ySr_yCu₃O_x as a function of its oxygen and strontium concentrations. The dependence T_c(x) decreases monotonically. For a constant value of x, the critical parameters grow monotonically with pressure. The largest value of T_c is observed in GdBa_1.5Cu₃O_6.63, which has the largest oxygen deficit. With increase of the time during which the pressure acts, the parameters T_c and H_c1 are observed to relax in GdBa_1.5Sr_0.5Cu₃O_x to their equilibrium values due to an increase in the degree of order of oxygen atoms in the CuO chains with compression of the unit cell. Hysteretic phenomena are also observed with the release of pressure. In GdBa_1.5Sr_0.5Cu₃O_x, near the metal-insulator transition (x = 6.63), the effect of pressure-induced oxygen ordering (∂T_c/∂P)₀ is close in magnitude to the intrinsic pressure effect (∂T_c/∂P)_i = 6.6 K/GPa, and the total effect (∂T_c/∂P) is equal to 13.7 K/GPa. In GdBaSrCu₃O_6.93, (∂T_c/∂P) is 2.5 times larger than in GdBa_1.5Sr_0.5Cu₃O_x, but the effect of oxygen ordering under pressure in GdBaSrCu₃O_x has not been detected.

Original language	English
Pages (from-to)	458-464
Number of pages	7
Journal	Physics of the Solid State
Volume	38
Issue number	3
State	Published - 1 Mar 1996
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Cite this

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title = "Effect of pressure-induced oxygen ordering on the superconducting properties of GdBa2-ySryCu3Ox",

abstract = "Magnetic measurements are used to investigate the effect of hydrostatic pressure up to 1 GPa on the superconducting transition temperature Tc and lower critical field Hc1 of the ceramic GdBa2-ySryCu3Ox as a function of its oxygen and strontium concentrations. The dependence Tc(x) decreases monotonically. For a constant value of x, the critical parameters grow monotonically with pressure. The largest value of Tc is observed in GdBa1.5Cu3O6.63, which has the largest oxygen deficit. With increase of the time during which the pressure acts, the parameters Tc and Hc1 are observed to relax in GdBa1.5Sr0.5Cu3Ox to their equilibrium values due to an increase in the degree of order of oxygen atoms in the CuO chains with compression of the unit cell. Hysteretic phenomena are also observed with the release of pressure. In GdBa1.5Sr0.5Cu3Ox, near the metal-insulator transition (x = 6.63), the effect of pressure-induced oxygen ordering (∂Tc/∂P)0 is close in magnitude to the intrinsic pressure effect (∂Tc/∂P)i = 6.6 K/GPa, and the total effect (∂Tc/∂P) is equal to 13.7 K/GPa. In GdBaSrCu3O6.93, (∂Tc/∂P) is 2.5 times larger than in GdBa1.5Sr0.5Cu3Ox, but the effect of oxygen ordering under pressure in GdBaSrCu3Ox has not been detected.",

author = "D'yakonov, {V. P.} and Fita, {I. M.} and Levchenko, {G. G.} and Markovich, {V. I.}",

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T1 - Effect of pressure-induced oxygen ordering on the superconducting properties of GdBa2-ySryCu3Ox

AU - D'yakonov, V. P.

AU - Fita, I. M.

AU - Levchenko, G. G.

AU - Markovich, V. I.

PY - 1996/3/1

Y1 - 1996/3/1

N2 - Magnetic measurements are used to investigate the effect of hydrostatic pressure up to 1 GPa on the superconducting transition temperature Tc and lower critical field Hc1 of the ceramic GdBa2-ySryCu3Ox as a function of its oxygen and strontium concentrations. The dependence Tc(x) decreases monotonically. For a constant value of x, the critical parameters grow monotonically with pressure. The largest value of Tc is observed in GdBa1.5Cu3O6.63, which has the largest oxygen deficit. With increase of the time during which the pressure acts, the parameters Tc and Hc1 are observed to relax in GdBa1.5Sr0.5Cu3Ox to their equilibrium values due to an increase in the degree of order of oxygen atoms in the CuO chains with compression of the unit cell. Hysteretic phenomena are also observed with the release of pressure. In GdBa1.5Sr0.5Cu3Ox, near the metal-insulator transition (x = 6.63), the effect of pressure-induced oxygen ordering (∂Tc/∂P)0 is close in magnitude to the intrinsic pressure effect (∂Tc/∂P)i = 6.6 K/GPa, and the total effect (∂Tc/∂P) is equal to 13.7 K/GPa. In GdBaSrCu3O6.93, (∂Tc/∂P) is 2.5 times larger than in GdBa1.5Sr0.5Cu3Ox, but the effect of oxygen ordering under pressure in GdBaSrCu3Ox has not been detected.

AB - Magnetic measurements are used to investigate the effect of hydrostatic pressure up to 1 GPa on the superconducting transition temperature Tc and lower critical field Hc1 of the ceramic GdBa2-ySryCu3Ox as a function of its oxygen and strontium concentrations. The dependence Tc(x) decreases monotonically. For a constant value of x, the critical parameters grow monotonically with pressure. The largest value of Tc is observed in GdBa1.5Cu3O6.63, which has the largest oxygen deficit. With increase of the time during which the pressure acts, the parameters Tc and Hc1 are observed to relax in GdBa1.5Sr0.5Cu3Ox to their equilibrium values due to an increase in the degree of order of oxygen atoms in the CuO chains with compression of the unit cell. Hysteretic phenomena are also observed with the release of pressure. In GdBa1.5Sr0.5Cu3Ox, near the metal-insulator transition (x = 6.63), the effect of pressure-induced oxygen ordering (∂Tc/∂P)0 is close in magnitude to the intrinsic pressure effect (∂Tc/∂P)i = 6.6 K/GPa, and the total effect (∂Tc/∂P) is equal to 13.7 K/GPa. In GdBaSrCu3O6.93, (∂Tc/∂P) is 2.5 times larger than in GdBa1.5Sr0.5Cu3Ox, but the effect of oxygen ordering under pressure in GdBaSrCu3Ox has not been detected.

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Effect of pressure-induced oxygen ordering on the superconducting properties of GdBa_2-ySr_yCu₃O_x

Abstract

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