Crossover between Channeling and Pinning at Twin Boundaries in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>YBa</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Cu</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>7</mml:mn></mml:msub></mml:math>Thin Films

Palau, Anna; Durrell, John; MacManus‐Driscoll, Judith L.; Harrington, S A; Puig, T.; Sandiumenge, F.; Obradors, X.; Blamire, M. G.

doi:10.1103/physrevlett.97.257002

Cited by 50 publications

(40 citation statements)

References 32 publications

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“…As shown in Fig. 16,17 So far, the defects mentioned above may be sorted as anisotropic in the sense that their contribution to J c depends on the direction of the applied magnetic field. 14,15 In contrast, the second peak at H ʈ c is probably due to the correlated defects parallel to the c-axis, such as twin planes, and edge and screw dislocations.…”

Section: Resultsmentioning

confidence: 99%

Angular-dependent vortex pinning mechanism in YBa2Cu3O7−δ/YSZ quasi-multilayer

Lin¹,

Cai²,

Chen³

et al. 2008

Journal of Applied Physics

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The temperature and magnetic field dependences of anisotropic pinning contributions of YBa 2 Cu 3 O 7−␦ / YSZ quasi-multilayer have been investigated by the measurement of angular-dependent critical current density ͑J c ͒. With the isotropic and anisotropic pinning contributions in a wide range of temperature, we identify the possible sources of the pinning centers and classify them into the weak and the strong flux pinning model. Angular-dependent J c ͑H , T͒ measurements have demonstrated that the growth control strategy is very effective in preventing the vortex motion at high fields and high temperatures. It is suggested that at high applied fields, such as 7 T, the pinning contribution of the nanostructured quasi-multilayers is dominated by the anisotropic disorders, while at intermediate-low fields ͑such as 1 T͒ the pinning contribution is determined by both isotropic and anisotropic disorders, suggesting the coexistence of isotropic and anisotropic pinning.

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Section: Resultsmentioning

confidence: 99%

Angular-dependent vortex pinning mechanism in YBa2Cu3O7−δ/YSZ quasi-multilayer

Lin¹,

Cai²,

Chen³

et al. 2008

Journal of Applied Physics

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“…This decrease is ascribed to a vortex channeling mechanism along the twin planes. This feature has been observed in YBCO thin films grown on vicinal substrates [30,31] and also in YBCO films containing twin planes [32]. It consists of an enhancement of vortex motion for certain field and temperature values, when the magnetic field is aligned with the grain boundaries and twin planes, respectively.…”

Section: Transport Propertiesmentioning

confidence: 88%

The Vortex Path Model Analysis of the Field Angle Dependence of the Critical Current Density in Nanocomposite YBa2Cu3 O 7−x – BaZrO3 Films Obtained by Low Fluorine Chemical Solution Deposition

Mos

Nasui

Gabor

et al. 2014

J Supercond Nov Magn

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In the present paper, we analyze the role of in situ grown BaZrO3 (BZO) inclusions in YBa2Cu3O7−x (YBCO) thin films prepared by chemical solution deposition using a low fluorine coating solution, on the field angle dependence of the critical current density, Jc(), data using the vortex path model. In order to form a coherent picture on the BZO doping influence on the pinning properties of the YBCO matrix, detailed structural analyses performed by X-ray diffraction techniques and microstructural evaluation by transmission electron microscopy are also presented. The evaluation of different contributions to the overall, Jc, permitted us to prove the effectiveness of the BZO inclusions acting as isotropic pinning centers, reflected in a uniform component of high relative value with respect to other components. For the studied 10 mol % BZO doping concentration, a threefold increase in the critical current density, Jc, of the YBCO host is measured, in self-field at 77 K, corresponding to a value of Jc=2.9MA/cm2, whereas a factor 10 is measured at 1 T (Jc=0.35 MA/cm2). © 2014, Springer Science+Business Media New York

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“…This lack of coherence should also have a significant effect on the J c performance at low temperatures where vortices easily channel along TBs. 12 Indeed J c (h) curves measured for a standard sample and YBCO-BZO nanocomposite at low temperature, 10 K ( Figure 5(a)), show that the standard sample presents a sharp suppression of J c at h ¼ 0 K (dashed line in Figure 5(a)) associated to easy vortex sliding along the TB planes (vortex channeling) whereas no hints of channeling are observed for the YBCO-BZO nanocomposite.…”

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confidence: 88%