Critical current and flux pinning properties of the superconducting Ti–V alloys

Matin, Md.; Chandra, L. S. Sharath; Chattopadhyay, M. K.; Meena, R.K.; Kaul, R.; Singh, M N; Sinha, A. K.; Roy, S. B.

doi:10.1016/j.physc.2015.02.049

Cited by 13 publications

(16 citation statements)

References 31 publications

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“…In Fig. 3(a), the theoretical lines 2 and 3 respectively represent flux line pinning due to the grain boundaries and dislocations [4,10]. It is observed in this figure that the role of point defects and dislocations are quite significant in pinning the flux lines in the x = 0 alloy.…”

Section: Resultsmentioning

confidence: 85%

“…Our previous studies reveal that though the grain boundaries pin the flux lines in these alloys, their is still lower than the commercial superconducting wires [3,4]. The average grain size in these alloys is found to vary from few hundred µm to few mm [4]. Thus, reducing the grain size may enhance the of these alloys.…”

Section: Introductionmentioning

confidence: 97%

“…They are machinable and have high upper critical field (Hc2(0)) [1,2]. Our previous studies reveal that though the grain boundaries pin the flux lines in these alloys, their is still lower than the commercial superconducting wires [3,4]. The average grain size in these alloys is found to vary from few hundred µm to few mm [4].…”

Section: Introductionmentioning

confidence: 99%

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Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

Paul

Ramjan

Venkatesh

et al. 2021

IEEE Trans. Appl. Supercond.

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The V-Ti alloys are promising materials as alternate to the commercial Nb-based superconductors for high currenthigh magnetic field applications. However, the critical current density (Jc) of these alloys are somewhat low due to their low grainboundary density. We show here that grain refinement of the V-Ti alloys and enhancement of the Jc can be achieved by the addition of Gd into the system, which precipitates as clusters along the grain boundaries. Both the Jc and the pinning force density ( ) increase with the increasing Gd content up to 1 At. % Gd, where they are more than 20 times higher than those of the parent V0.60Ti0.40 alloy. Introduction of Gd into the system also leads to ferromagnetic (FM) correlations, and the alloys containing more than 0.5 At. % Gd exhibit spontaneous magnetization. In spite of the FM correlations, the superconducting transition temperature increases slightly with Gd-addition.

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Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 97%

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Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

Paul

Ramjan

Venkatesh

et al. 2021

IEEE Trans. Appl. Supercond.

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“…Structural investigation of these samples is performed with the help of optical metallography and angle dispersive x-ray diffraction (XRD) experiments using synchrotron radiation source. The details of the optical metallography and XRD experiments are available in references [10,13,14]. The measurements of magnetization (M) as functions of temperature (T) and time (t) were performed using a commercial vibrating sample magnetometer from Quantum Design, USA.…”

Section: Methodsmentioning

confidence: 99%

“…Detailed structural information of the currently investigated Ti-V samples was obtained from the XRD experiments, which has already been published [10,13,14]. The XRD patterns indicate that the as cast Ti 0.8 V 0.2 sample contains hexagonal ω (∼20%) and orthorhombic a ¢ (∼3%) phases within the major body-centred-cubic β phase matrix of this sample [14].…”

Section: Structural and Metallurgical Characterizationmentioning

confidence: 99%

High-field paramagnetic Meissner effect and flux creep in low-T_cTi–V alloy superconductors

Matin

Chattopadhyay

Chandra

et al. 2015

Supercond. Sci. Technol.

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We report an experimental study on the high-field paramagnetic Meissner effect (HFPME) performed by measuring both the temperature and time dependence of magnetization in the two compositions of superconducting Ti–V alloys where certain secondary phases are non-superconducting, and thereby act as efficient pinning centres for the flux lines. While spatially non-uniform flux density driven by flux line pinning at these secondary phases is the necessary condition for the observation of the HFPME, our study indicates that the flux creep effect plays a supplementary role to reinforce the HFPME. It is found that in the temperature and magnetic field regime of the HFPME, the field-cooled magnetization of these samples relaxes monotonically towards a more positive value with elapsed time. We comment on how this paramagnetic relaxation behaviour of the field-cooled magnetization is correlated with the unusual thermo-magnetic responses related to the HFPME.

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Tuning the Physical Properties of V-Ti-Ce Alloy Superconductors Through Successive Cold-Working and Annealing at 650 °C

Khandelwal,

Mirza,

Chandra

et al. 2024

J Supercond Nov Magn

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V- Ti alloys are promising alternatives to Nb for the construction of superconducting solenoids that produce high magnetic fields. The critical current density ($$J_C$$ J C ), which quantifies the capacity of a superconductor to carry large dissipationless current, increases in the V-Ti alloys with the addition of Ce. Here, the effects of successive cold working and annealing on the electrical resistivity, $$J_C$$ J C , and microstructure of the V$$_{0.59}$$ 0.59 Ti$$_{0.40}$$ 0.40 Ce$$_{0.01}$$ 0.01 alloy are studied. The $$J_C$$ J C is the maximum after the second cold rolling. Annealing at 650 $$^{\circ }$$ ∘ C is found to nucleate and grow the $$\alpha $$ α -phase which is detrimental to $$J_C$$ J C , whereas the precipitation of the $$\alpha '$$ α ′ -phase is found to improve the $$J_C$$ J C .

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Critical current and flux pinning properties of the superconducting Ti–V alloys

Cited by 13 publications

References 31 publications

Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

High-field paramagnetic Meissner effect and flux creep in low-T_cTi–V alloy superconductors

Tuning the Physical Properties of V-Ti-Ce Alloy Superconductors Through Successive Cold-Working and Annealing at 650 °C

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Critical current and flux pinning properties of the superconducting Ti–V alloys

Cited by 13 publications

References 31 publications

Grain Refinement and Enhancement of Critical Current Density in the V0.60Ti0.40 Alloy Superconductor With Gd Addition

Grain Refinement and Enhancement of Critical Current Density in the V0.60Ti0.40 Alloy Superconductor With Gd Addition

High-field paramagnetic Meissner effect and flux creep in low-TcTi–V alloy superconductors

Tuning the Physical Properties of V-Ti-Ce Alloy Superconductors Through Successive Cold-Working and Annealing at 650 °C

Contact Info

Product

Resources

About

Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

Grain Refinement and Enhancement of Critical Current Density in the V_0.60Ti_0.40 Alloy Superconductor With Gd Addition

High-field paramagnetic Meissner effect and flux creep in low-T_cTi–V alloy superconductors