Resistive transition in TlBiSrCaCuO thin films in magnetic fields

Takei, H.; Kugai, Hirokazu; Torii, Yasuko; Tada, Koji

doi:10.1016/0921-4534(93)90014-h

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…[9]. The U, values reported for other cuprate superconductors are also shown in the same figure [13], [14]. Both the magnitude and the slope for the (Hg, Re)-1223 thin films are almost identical to those previously reported for high-J, undoped Hg-1212 thin films [13].…”

Section: Methodssupporting

confidence: 76%

Transport properties of (Hg,M)-12(n-1)n (M=Re,Mo; n=2,3) superconducting thin films

Moriwaki

Sugano²,

Adachi³

et al. 1999

IEEE Trans. Appl. Supercond.

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We have successfully fabricated 200 -500 nm thick highly c-axis oriented (Hg, Re)-1223 and (Hg, M)-1212 (M = Re, MO) thin films on SrTiOs (100) substrates by using HgO/M-Ba-Ca-Cu-0 multilayer precursor films prepared by pulsed laser deposition. Their electrical transport properties in magnetic fields less than 7 T are investigated using 5 -50 pm wide bridges patterned by means of electron-beam lithography and ion milling without using water. The (Hg, Re)-1223 film exhibits a T, (zero) of 127.5 K and a J , value at 77 K of 1.5 and 0.2 x lo6 A/cm2 in a self-field and 1 T field, respectively. Higher J , values below 100 K are observed for (Hg, M)-1212 (M = Re, MO) films with better crystallinity and surface morphology than the 1223 film in spite of their lower T, (zero) of 115-122 K. The (Hg, Re)-1212 film exhibits the highest J, values of 5, 1.5, and 0.4 x lo6 A/cm2at 77 and 100 K in a self-field and at 77 K in 1 T field, respectively. The irreversibility field above 77 K evaluated from the resistive transitions of these films is found to be substantially higher than those for undoped Hg-1212 and T1-1223 thin films.

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Section: Methodssupporting

confidence: 76%

Transport properties of (Hg,M)-12(n-1)n (M=Re,Mo; n=2,3) superconducting thin films

Moriwaki

Sugano²,

Adachi³

et al. 1999

IEEE Trans. Appl. Supercond.

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“…8͒ to very high values ͑about 100͒ in Tl-2223 or Tl-2212, 9 it should be possible to study the influence on the resistivity of this anisotropy. Tl-2212 films 10,11 were found to exhibit a ''a 0 '' dependence of U. Tl-2223 crystals 12 were found to exhibit an ''a 0 0.8 '' dependence, very close to a 0 . This behavior suggests that the nucleation of small loops governs the dissipation in Tl-based compounds.…”

Section: Introductionmentioning

confidence: 92%

Anisotropy dependence of half-loop-mediated vortex motion in thallium-based superconductors studied by magnetoresistivity

Warmont¹,

Hardy²,

Simon³

1998

Phys. Rev. B

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By measuring the temperature dependence of the magnetoresistivity, we have studied the activation energy U of two Tl-based superconducting oxides having different electronic anisotropies ͑Tl-2212, which is very anisotropic, close to Bi-2212, and Tl-1212, the anisotropy of which is about 10͒. The activation energies are described in terms of movements of half loops of vortices, with a lateral size of about the intervortex spacing a 0 . Taking into account the field dependence of the elastic coefficients C 44 and C 66 , this activation energy is estimated and compared to the experimental data. The precise magnetic-field dependence of the activation energy in Tl-2212 and Tl-1212 are different. This difference is taken into account in the frame of a single model considering two different regimes according to the anisotropy value.

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“…It contains three CuO 2 -planes and a semi insulating charge reservoir layer Cu 0.5 Tl 0.5 Ba 2 O 4−δ in the unit cell. This phase can be prepared under high as well as normal pressure in the form of thin films and bulk samples [3][4][5][6][7]. The thin films of this compound have a critical current density of the order of 10 7 A/cm 2 (77 K and 0 T) and 10 5 A/cm 2 (77 K and 10 T) [8].…”

Section: Introductionmentioning

confidence: 99%

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

Mohammed

Awad

Abou‐Aly

et al. 2012

J Supercond Nov Magn

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In this study, superconducting samples of type Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ added by SnO 2 and In 2 O 3 in nano-scale were prepared by a solid-state reaction technique. The concentrations of both SnO 2 and In 2 O 3 were 0.0, 0.1, 0.2, 0.4, 0.6 and 1.0 wt% of the sample's total mass. The prepared samples were characterized using X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) for phase analysis and microstructure examination. The elemental content of the prepared samples was determined using energy dispersive X-ray (EDX) and particle induced X-ray emission (PIXE). The results of elemental content, determined from EDX and PIXE, were compared and discussed. In addition, The oxygen content of these samples was obtained using non Rutherford backscattering spectroscopy (RBS) at 3 MeV proton beam. It was found that the Oxygen-content of (Cu 0.5 Tl 0.5 )-1223 phase was not affected by both SnO 2 and In 2 O 3 nano-oxides addition. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T 0 ). An increase in the superconducting transition temperature T c from 106 to 119 K was observed as x was varied from 0.0 to 0.6 wt% for (SnO 2 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ , followed by a systematic decrease with increasing nano-SnO 2 addition. On the other hand, the T c values for (In 2 O 3 ) x Cu 0.5 Tl 0.5 Ba 2 Ca 2 Cu 3 O 10−δ show a small variation with x. Moreover, the variation rate of T c with x, for both nano-additions, was found to be directly proportional to the variation of the volume fraction of the prepared samples.

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Resistive transition in TlBiSrCaCuO thin films in magnetic fields

Cited by 11 publications

References 15 publications

Transport properties of (Hg,M)-12(n-1)n (M=Re,Mo; n=2,3) superconducting thin films

Transport properties of (Hg,M)-12(n-1)n (M=Re,Mo; n=2,3) superconducting thin films

Anisotropy dependence of half-loop-mediated vortex motion in thallium-based superconductors studied by magnetoresistivity

Ion Beam Analysis and Electrical Resistivity Studies of (Cu0.5Tl0.5)-1223 Phase with Added Nano-oxides

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