{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Chapter 12: Superconducting materials" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.1: Critical_field.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "//Example NO.12.1\n", "//Page No.356\n", "//To find critical field.\n", "clc;clear;\n", "Tc = 3.7;//Critical temperature of tin -[K].\n", "Ho = 0.0306;//Magnetic field -[T].\n", "T = 2;//Temperature -[K].\n", "Hc = Ho*(1-((T^(2))/(Tc^(2))));//Critical magnetic field\n", "printf('\nCritical field at 2K is %.4f T',Hc);" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.2: Critical_field.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "\n", "//Example NO.12.2\n", "//Page No.356\n", "//To find critical field.\n", "clc;clear;\n", "Tc = 7.26;//Critical temperature of lead -[K].\n", "Ho = 6.4*10^3;//Magnetic field -[A/m^3].\n", "T = 5;//Temperature -[K].\n", "Hc = Ho*(1-((T^(2))/(Tc^(2))));//Critical magnetic field\n", "printf('\nCritical field at 5K is %.2f T',Hc);\n", "" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.3: value_of_Tc.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "//Example NO.12.3\n", "//Page No.357\n", "//To find the value of Tc.\n", "clc;clear;\n", "M1 = (199.5^(1/2));//Atomic mass. \n", "M2 = (203.4^(1/2));//Atomic mass.\n", "Tc1 = (4.185);//Critical temperature of Hg -[K].\n", "Tc = (Tc1*M1/M2);//Critical temperature\n", "printf('\nCritical temperature of Hg with atomic mass,203.4 is %.5f K',Tc);" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.4: critical_current_density.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "//Example NO.12.4\n", "//Page No.357\n", "//To find critical current density.\n", "clc;clear;\n", "D=1*10^(-3);//Diameter of the wire -[m].\n", "Tc = 7.18;//Critical temperature -[K].\n", "Ho = 6.5*10^4;//Critical field -[A/m].\n", "T = 4.2;//Temperature -[K].\n", "R = 0.5*10^-3;//Radius.\n", "I = 134.33;//Current.\n", "Hc = Ho*(1-((T^(2))/(Tc^(2))));\n", "printf('\nCritical magnetic field is %3.3e A/m',Hc);\n", "ic = (2*%pi*R*Hc);\n", "printf('\nCritical current is %.2f A',ic);\n", "J = (I/(%pi*R^2));\n", "printf('\nCritical current density is %3.3e A/m^2',J);" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.5: frequency_of_radiation.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "//Example NO.12.5\n", "//Page No.358\n", "//To find frequency.\n", "clc;clear;\n", "e = (1.6*10^-19);//value of electron.\n", "V = (6*10^-6);//Voltage applied across the junction -[V]\n", "h = (6.626*10^-34);//Planck's constant\n", "v = ((2*e*V)/h);//Frequency of ac signal\n", "printf('\nFrequency of ac signal is %3.3e Hz',v);\n", "" ] } , { "cell_type": "markdown", "metadata": {}, "source": [ "## Example 12.6: Band_gap.sce" ] }, { "cell_type": "code", "execution_count": null, "metadata": { "collapsed": true }, "outputs": [], "source": [ "\n", "//Example NO.12.6\n", "//Page No.358\n", "//To find band gap of superconducting lead \n", "clc;clear;\n", "KB = (1.38*10^-23);//Boltzman's constant.\n", "Tc = (7.19);//Critical temperature of lead -[K].\n", "Eg = (3.5*KB*Tc);//Energy gap of semiconductor.\n", "printf('\nBand gap of superconducting lead is %3.3e J',Eg);\n", "Eg = (Eg/(1.6*10^-19*10^(-3)));\n", "printf('\nBand gap of superconducting lead is %.2f meV',Eg);\n", "" ] } ], "metadata": { "kernelspec": { "display_name": "Scilab", "language": "scilab", "name": "scilab" }, "language_info": { "file_extension": ".sce", "help_links": [ { "text": "MetaKernel Magics", "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" } ], "mimetype": "text/x-octave", "name": "scilab", "version": "0.7.1" } }, "nbformat": 4, "nbformat_minor": 0 }