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Principle
With electron spin resonance (ESR) spectroscopy compounds having unpaired electrons can be studied. The physical background of ESR is similar to that of nuclear magnetic resonance (NMR), but with this technique electron spins are excited instead of sp ...
Principle Model experiment for electron spin resonance for clear demonstration of interaction between the magnetic moment of the electron spin with a superimposed direct or alternating magnetic field.
Related topics
The resistivity and Hall voltage of a rectangular germanium sample are measured as a function of temperature and magnetic field. The band spacing, the specific conductivity, the type of charge carrier and the mobility of the charge carriers are deter ...
The resistance and Hall voltage are measured on a rectangular strip of germanium as a function of the temperature and of the magnetic field. From the results obtained the energy gap, specific conductivity, type of charge carrier and the carrier mobili ...
The conductivity of a germanium test piece is measured as a function of temperature. The energy gap is determined from the measured values.
Tasks
Approaching a very sharp metal tip to an electrically conductive sample by applying a electrical field leads to a current between tip and sample without any mechanical contact. This so-called tunneling current is used to investigate the electronic top ...
Scanning tunneling microscopy is used to image the (electronic) topography of different samples on a nanoscopic scale. By scanning across the surface and using analyze tools atomic arrangements, charge density waves and defects are measured and evalua ...
Scanning tunneling microscopy is used to image the (electronic) topography of a freshly prepared graphite (HOPG) and gold surface. By spectroscopic measurements (I-z) the local effective work function can be determined in dependence of the material an ...
The tunneling current between a very sharp metal tip and an electrically conductive sample is used to investigate the current-voltage characteristics at a nanoscopic scale. The bandstructure of gold, graphite (HOPG) and MoS2 are investigated.
In addition to the tunneling effect measured by tunneling spectroscopy another quantum mechanical effect the charge density waves are investigated for different samples. Charge density waves are modulated electron waves due to static and periodic latt ...
Approaching a very sharp metal tip to anelectrically conductive sample byapplying a electrical field leads to acurrent between tip and sample withoutany mechanical contact. This so-calledtunneling current is used to investigatethe electronic topograph ...
Spectra of X-rays from a copper anode are analyzed using different monocrystals and the results plotted graphically. The energies of the characteristic lines are then determined from the positions of the glancing angles for the various orders&nbs ...
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