Problem

Using Equation 18.14, determine which of the superconducting elements in Table 18.7 are su...

Using Equation 18.14, determine which of the superconducting elements in Table 18.7 are superconducting at 3 K and in a magnetic field of 15,000 A/m.

Equation 18.14

Table 18.7 Critical Temperatures and Magnetic Fluxes for Selected Superconducting Materials

Material	Critical Temperature TC (K)	Critical Magnetic Flux Density BC (tesla)a
Elementsb
Tungsten	0.02	0.0001
Titanium	0.40	0.0056
Aluminum	1.18	0.0105
Tin	3.72	0.0305
Mercury (α)	4.15	0.0411
Compounds and Alloysb
Nb–Ti alloy
Nb–Zr alloy	10.2	12
PbMo6S8	10.8	11
V3Ga	14.0	45
Nb3Sn	16.5	22
Nb3Al	18.3	22
Nb3Ge	18.9	32
Ceramic Compounds
YBa2Cu3O7	92	—
Bi2Sr2Ca2Cu3O10	110	—
Tl2Ba2Ca2Cu3O10	125	—
HgBa2Ca2Cu2O8	153	—

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