Magnetic measurements of the upper and lower critical fields of oxygen-deficient<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">YBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msu

Vandervoort, K. G.; Welp, U.; Kessler, J.; Claus, H.; Crabtree, G. W.; Kwok, W. K.; Umezawa, A.; Veal, B. W.; Downey, J.W.; Paulikas, A. P.; Liu, J.Z.

doi:10.1103/physrevb.43.13042

Cited by 49 publications

(13 citation statements)

References 43 publications

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“…5,[13][14][15][16][17][18][19][43][44][45][46] Its influence may be accounted for by replacing Eq. ͑3͒ by…”

Section: Scaling Proceduresmentioning

confidence: 99%

“…One of the ways to overcome this difficulty is to use the temperature dependence of the magnetic moment of the sample M (T), measured in a constant external magnetic field H, and to extrapolate the linear part of the M (T) curve to the M value corresponding to the normal state of the sample. [1][2][3][4][5] This procedure is usually justified by invoking the Abrikosov theory of the mixed state according to which the magnetization per unit volume may by written as…”

Section: Introductionmentioning

confidence: 99%

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Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors

Landau

Ott

2002

Phys. Rev. B

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Using the Ginzburg-Landau theory in very general terms, we develop a simple scaling procedure which allows to establish the temperature dependence of the upper critical field H c2 and the value of the superconducting critical temperature T c of type-II superconductors from measurements of the reversible isothermal magnetization. An analysis of existing experimental data shows that the normalized dependencies of H c2 on T/T c are practically identical for all families of high-T c superconductors at all temperatures for which the magnetization data are available.

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“…5,[13][14][15][16][17][18][19][43][44][45][46] Its influence may be accounted for by replacing Eq. ͑3͒ by…”

Section: Scaling Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors

Landau

Ott

2002

Phys. Rev. B

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“…At this height, the maximum tangential magnetic field calculated is 6775.85 A/m. This maximum magnetic field is far from the lower critical field (Meissner state limit) for superconductors like YBaCuO (9223.2 A/m) or Ti2223 (8234.45 A/m) at relatively low temperatures (100-50 K), [32][33][34][35][36] so it is assured that a complete Meissner state can occur. The lower critical field is higher when the temperature decreases.…”

Section: Equilibrium Levitation Positionmentioning

confidence: 99%

Design and analysis of a non-hysteretic passive magnetic linear bearing for cryogenic environments

Díez-Jiménez

Valiente–Blanco

Castro‐Fernández

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part J:

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In this study, the mechanical design and analysis of a magnetic levitating linear bearing suitable for working in the nonhysteretic range of forces is presented. The semi-cylindrical design of the superconductor provides stable equilibrium positioning and restoring forces in all degrees of freedom except for two with a cylindrical magnet floating along the axis of revolution/displacement. Using finite element analysis, it has been proven that the magnet can float stably and passively in a complete non-hysteretic Meissner state. This non-hysteretic passive linear bearing could be suitable for long-stroke precision positioning. The high translational symmetry of the magnetic field seen by the superconductor assures a usable long stroke of around AE90 mm with full performance and AE150 mm with reduced performance. This linear bearing in combination with an actuating system for only one degree of freedom could be used for accurate precision positioning systems for cryogenic environments with zero hysteresis in the movement.

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“…Although this situation casts some doubts on the validity of the assumptions that were made, the same approach was frequently used for evaluations of H c2 (T ) of Y-based cuprates. [17][18][19][20] The discrepancies are even worse if we apply the same approach to Bi-based HTSC's. The corresponding plots for a Bi 2 Sr 2 CaCu 2 O 8 (Bi-2212) sample, studied in Ref.…”

Section: Intuitive Approachmentioning

confidence: 99%

Scaling of the Equilibrium Magnetization in the Mixed State of Type-II Superconductors

Landau

Ott

2005

J Low Temp Phys

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Magnetic measurements of the upper and lower critical fields of oxygen-deficientYBa2Cu3

Cited by 49 publications

References 43 publications

Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors

Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors

Design and analysis of a non-hysteretic passive magnetic linear bearing for cryogenic environments

Scaling of the Equilibrium Magnetization in the Mixed State of Type-II Superconductors

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