## Treatise on Materials Science and Technology, Volume 2 |

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Page 236

difference in free energy between the superconducting and

absolute zero the thermodynamic critical field H . ( 0 ) is given by H . ( 0 ) 2 / 81 =

1 / 2N ( 0 ) 42 ( 6 ) The critical field falls off with increasing temperature ...

difference in free energy between the superconducting and

**normal**states . Atabsolute zero the thermodynamic critical field H . ( 0 ) is given by H . ( 0 ) 2 / 81 =

1 / 2N ( 0 ) 42 ( 6 ) The critical field falls off with increasing temperature ...

Page 237

field Ha , the field will penetrate into the

superconductor . To get the difference of the free energies for H , + 0 , we

therefore have to add the field expulsion energy density H , ? / 87 . Thus we get

for finite applied ...

field Ha , the field will penetrate into the

**normal**metal but not into thesuperconductor . To get the difference of the free energies for H , + 0 , we

therefore have to add the field expulsion energy density H , ? / 87 . Thus we get

for finite applied ...

Page 238

This yields type I behavior with sharp transitions between the superconductive

and the

nucleation problems because of the positive surface energy ) . Figure 4a shows a

...

This yields type I behavior with sharp transitions between the superconductive

and the

**normal**state at H with the possibility of supercooling the**normal**state (nucleation problems because of the positive surface energy ) . Figure 4a shows a

...

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angle anisotropy approximation assumed atoms average axis c-sites calculated cations coherent compounds concentration condition considerations constant contribution corresponding crystal curve defect density dependence determined diffusion direction discussed dislocations displacement effect elastic elastic scattering electron energy equation et al exist experimental experiments factor field flux lines follows force function garnet given gives important increasing Inelastic Scattering interaction interface ions lattice length limit magnetic materials measured Merwe metal method misfit mode neutron normal obtained parameter phase phonon Phys plane position potential present properties range rare earth reference region relation resolution resonance respectively sample scattering cross section shown shows single solid solution space strain stress structure substrate superconducting surface Table temperature tetrahedral theory thermal thickness transition unit values vector X-ray