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-{
- "cells": [
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "# 9: Superconductivity"
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 1, Page number 9-22"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 2,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "transition temperature is 11.3 K\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "Hc=1*10**5; #critical magnetic field(A/m)\n",
- "T=8; #temperature(K)\n",
- "H0=2*10**5; #critical magnetic field(A/m)\n",
- "\n",
- "#Calculation\n",
- "Tc=T/math.sqrt(1-(Hc/H0)); #transition temperature(K)\n",
- "\n",
- "#Result\n",
- "print \"transition temperature is\",round(Tc,1),\"K\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 2, Page number 9-22"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 4,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "frequency is 4.1 *10**9 Hz\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "e=1.6*10**-19; #charge(c)\n",
- "h=6.626*10**-34; #plank constant\n",
- "V=8.5*10**-6; #voltage(V)\n",
- "\n",
- "#Calculation\n",
- "new=2*e*V/h; #frequency(Hz)\n",
- "\n",
- "#Result\n",
- "print \"frequency is\",round(new/10**9,1),\"*10**9 Hz\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 3, Page number 9-22"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 7,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "critical field is 0.02166 Tesla\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "T=2; #temperature(K)\n",
- "Tc=3.7; #critical temperature(K)\n",
- "H0=0.0306; #critical magnetic field(A/m)\n",
- "\n",
- "#Calculation\n",
- "Hc=H0*(1-(T/Tc)**2); #critical field(Tesla)\n",
- "\n",
- "#Result\n",
- "print \"critical field is\",round(Hc,5),\"Tesla\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 4, Page number 9-23"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 11,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "maximum critical temperature is 7.2 K\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "Hc=200*10**3; #critical magnetic field(A/m)\n",
- "Tc=12; #critical temperature(K)\n",
- "H0=250*10**3; #critical magnetic field(A/m)\n",
- "\n",
- "#Calculation\n",
- "T=Tc*math.sqrt(1-(Hc/H0)**2); #maximum critical temperature(K)\n",
- "\n",
- "#Result\n",
- "print \"maximum critical temperature is\",T,\"K\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 5, Page number 9-23"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 14,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "critical field is 0.0163 Tesla\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "T=2.5; #temperature(K)\n",
- "Tc=3.7; #critical temperature(K)\n",
- "H0=0.03; #critical magnetic field(A/m)\n",
- "\n",
- "#Calculation\n",
- "Hc=H0*(1-(T/Tc)**2); #critical field(Tesla)\n",
- "\n",
- "#Result\n",
- "print \"critical field is\",round(Hc,4),\"Tesla\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 6, Page number 9-23"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 16,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "frequency is 313.96 *10**9 Hz\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "e=1.6*10**-19; #charge(c)\n",
- "h=6.625*10**-34; #plank constant\n",
- "V=650*10**-6; #voltage(V)\n",
- "\n",
- "#Calculation\n",
- "new=2*e*V/h; #frequency(Hz)\n",
- "\n",
- "#Result\n",
- "print \"frequency is\",round(new/10**9,2),\"*10**9 Hz\""
- ]
- },
- {
- "cell_type": "markdown",
- "metadata": {},
- "source": [
- "## Example number 7, Page number 9-24"
- ]
- },
- {
- "cell_type": "code",
- "execution_count": 18,
- "metadata": {
- "collapsed": false
- },
- "outputs": [
- {
- "name": "stdout",
- "output_type": "stream",
- "text": [
- "critical field is 3.365 *10**3 A/m\n"
- ]
- }
- ],
- "source": [
- "#importing modules\n",
- "import math\n",
- "from __future__ import division\n",
- "\n",
- "#Variable declaration\n",
- "T=5; #temperature(K)\n",
- "Tc=7.2; #critical temperature(K)\n",
- "H0=6.5*10**3; #critical magnetic field(A/m)\n",
- "\n",
- "#Calculation\n",
- "Hc=H0*(1-(T/Tc)**2); #critical field(A/m)\n",
- "\n",
- "#Result\n",
- "print \"critical field is\",round(Hc/10**3,3),\"*10**3 A/m\""
- ]
- }
- ],
- "metadata": {
- "kernelspec": {
- "display_name": "Python 2",
- "language": "python",
- "name": "python2"
- },
- "language_info": {
- "codemirror_mode": {
- "name": "ipython",
- "version": 2
- },
- "file_extension": ".py",
- "mimetype": "text/x-python",
- "name": "python",
- "nbconvert_exporter": "python",
- "pygments_lexer": "ipython2",
- "version": "2.7.11"
- }
- },
- "nbformat": 4,
- "nbformat_minor": 0
-}
generated by cgit (git 2.34.1) at 2025-03-12 14:45:18 +0000