Department of Applied Physics / Measurement of Physical Properties

A physical property is any property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its changes between momentary states. Physical properties are often referred to as observables. They are not modal properties. Quantifiable physical property is called physical quantity.

Physical properties are often characterized as intensive and extensive properties. An intensive property does not depend on the size or extent of the system, nor on the amount of matter in the object, while an extensive property shows an additive relationship. These classifications are in general only valid in cases when smaller subdivisions of the sample do not interact in some physical or chemical process when combined.

Electric IV measurement (1 pcs)
An I–V curve (current–voltage curve) or current–voltage characteristic is a relationship, typically represented as a chart or graph, between the electric current through a circuit, device, or material, and the corresponding voltage, or potential difference across it.
Select
Magneto-Optical Kerr Effect (1 pcs)

The Magneto-Optical Kerr Effect (MOKE) measurement is a technique used to study the magnetization and magnetic properties of materials. It involves shining polarized light onto a sample's surface and measuring changes in the polarization state of the reflected light due to the interaction with the material's magnetization. By varying the angle of the incident light or applying an external magnetic field, researchers can extract information about the material's magnetic domains, anisotropy, and other magnetic characteristics.

Select
Magnetometers
A magnetometer is a device that measures magnetism—the direction, strength, or relative change of a magnetic field at a particular location. The measurement of the magnetization of a magnetic material (like a ferromagnet) is an example. A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field.
You do not currently have access to any of the resources in this group.
Micropipette force sensors (2 pcs)

The micropipette force sensor (MFS) technique relies on measuring the forces acting on a force-calibrated, hollow glass micropipette by optically detecting its deflections. The MFS technique covers a wide micro- and mesoscopic regime of detectable forces (tens of pN to mN) and sample sizes (μm to mm), does not require gluing of the sample to the cantilever, and allows for simultaneous optical imaging of the sample throughout the experiment.

Source: Backholm, Matilda; Bäumchen, Oliver: Micropipette force sensors for in vivo force measurements on single cells and multicellular microorganisms

Select
Physical Property Measurement System (1 pcs)
The PPMS is an automated low-temperature and magnet system for the measurement of material properties like specific heat, magnetic AC and DC susceptibility and both electrical and thermal transport properties (like Hall Effect, thermoelectric figure of merit and Seebeck Effect).
Select
Spin Wave Spectroscopy (1 pcs)

Spin wave spectroscopy is a technique employed in condensed matter physics to study the collective excitations of electron spins, known as spin waves, within magnetic materials. By using various experimental methods such as neutron scattering or Brillouin light scattering, spin wave spectroscopy measures the energy and momentum of these spin waves, providing insights into the magnetic properties, interactions, and dynamics of the material's spin system. This approach helps researchers understand phenomena like magnetic ordering, anisotropy, and spin transport, with applications in fields ranging from magnetism-based electronics (spintronics) to fundamental studies of magnetism.

Select