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"metadata": {
"name": "",
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Chapter22-Superconductivity"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg646"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 22.1\n",
"##calculation of magnetic field\n",
"\n",
"##given values\n",
"\n",
"Tc=7.2;##transition temp in K\n",
"T=5.;##temp in K\n",
"Hc=3.3*10**4;##magnetic field at T in A/m\n",
"\n",
"\n",
"##calculation\n",
"Hc0=Hc/(1-(T**2/Tc**2));\n",
"print'%s %.2f %s'%('max value of H at 0K (in A/m) is ',Hc0,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"max value of H at 0K (in A/m) is 63737.70 \n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg646"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 22.2\n",
"##calculation of transition temperature\n",
"\n",
"##given values\n",
"\n",
"T=8.;##temp in K\n",
"Hc=1*10**5.;##critical magnetic field at T in A/m\n",
"Hc0=2*10**5.;##magnetic field at 0 K in A/m\n",
"\n",
"##calculation\n",
"Tc=T/(math.sqrt(1.-Hc/Hc0));\n",
"print'%s %.2f %s'%('transition temp in K is',Tc,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"transition temp in K is 11.31 \n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg647"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 22.3\n",
"##calculation of temp at which there is max critical field\n",
"\n",
"##given values\n",
"\n",
"Tc=7.26;##critical temp in K\n",
"Hc=8*10**5.;##max critical magnetic field at T in A/m\n",
"H=4*10**4.;## subjected magnetic field at in A/m\n",
"\n",
"##calculation\n",
"T=Tc*(math.sqrt(1.-H/Hc));\n",
"print'%s %.2f %s'%('max temp for superconductivity in K is',T,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"max temp for superconductivity in K is 7.08 \n"
]
}
],
"prompt_number": 4
}
],
"metadata": {}
}
]
}
|
