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Principle
A nickel, tungsten or bismuth rod is brought between the faces of pole pieces 06493-00, attached to U-shaped magnet 06320-00. Rods made of paramagnetic or ferromagnetic materials align themselves parallel to the lines of the magnetic field, whereas ones made of ...
The volume expansion of liquids and the linear expansion various materials is determined as a function of temperature.
Tasks
Prinicple
The linear expansion of various materials is determined as a function of temperature
The volume expansion of liquids is determined as a function of temperature.
Determine the volume expansion of n-heptane (C7H16), olive oil and water as a function of temperature, using the pycnometer.
The thermal conductivity of copper and aluminium is determined in a constant temperature gradient from the calorimetrically measured heat flow. The electrical conductivity of copper and aluminium is determined, and the Wiedmann-Franz law is tested.
Tasks< ...
A magnetic field is generated in a ring-shaped iron core by a continuous adjustable direct current applied to two coils. The field strength Η and the flux density B are measured and the hysteresis recorded. The remanence and the coercive field strength of two di ...
With the aid of two mirrors in a Michelson arrangement, light is brought to interference. Due to the magnetostrictive effect, one of the mirrors is shifted by variation in the magnetic field applied to a sample, and the change in the interference pattern is observed ...
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 ...
The spectra of the X-rays that are reflected with various different orientations by NaCl monocrystals are analysed. The associated interplanar spacings are determined based on the Bragg angles of the characteristic lines.
When polycrystalline samples are irradiated with X-rays a characteristic diffraction pattern results. These Debye-Scherrer reflections are photographed and then evaluated.
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