Related Experiment Video
Updated: Feb 7, 2026
08:01
Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
7.7K
Voigt effect-based wide-field magneto-optical microscope integrated in a pump-probe experimental setup.
T Janda1, L Nádvorník2, J Kuchařík1
1Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16 Prague 2, Czech Republic.
The Review of Scientific Instruments
|August 3, 2018
Summary
This study presents a new experimental setup for magneto-optical microscopy, enabling detailed studies of magnetic materials. The system reveals how defects and strain influence magnetic anisotropy in ferromagnetic semiconductors.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Magnetism
Background:
- Magneto-optical (MO) microscopy is crucial for studying magnetic materials.
- Spatiotemporal resolution is key to understanding complex magnetic phenomena.
- Previous methods lacked integrated wide-field imaging for diverse magnetic anisotropies.
Purpose of the Study:
- To develop and demonstrate an advanced experimental setup for spatially resolved pump-probe experiments.
- To integrate a wide-field magneto-optical microscope for versatile magnetic anisotropy studies.
- To investigate the influence of mechanical defects and strain on magnetic properties.
Main Methods:
- Utilized a pump-probe technique combined with a wide-field magneto-optical microscope.
- Employed polar Kerr and Voigt effects to study perpendicular and in-plane magnetic anisotropy, respectively.
- Tested the setup on (Ga,Mn)As ferromagnetic semiconductor samples under varying conditions.
Main Results:
- Demonstrated the capability to study both perpendicular-to-plane and in-plane magnetic anisotropy.
- Observed significant alterations in magnetic anisotropy near mechanical defects in (Ga,Mn)As.
- Showcased how strain, induced by a piezoelectric transducer, spatially modifies magnetic anisotropy.
Conclusions:
- The integrated MO microscope setup provides essential spatiotemporal resolution for materials research.
- Mechanical defects and applied strain have a profound impact on magnetic anisotropy.
- The setup holds promise for investigating challenging magnetic systems like compensated antiferromagnets.
Related Concept Videos
01:30ATP Driven Pumps III: V-type Pumps
4.9K
V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...
4.9K
01:34ATP Driven Pumps II: P-type Pumps
6.4K
The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...
6.4K
01:13Pumped Concrete
395
Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
395
01:07Refrigerators and Heat Pumps
3.0K
Refrigerators or heat pumps are heat engines operating in a reverse direction. For a refrigerator, the focus is on removing heat from a specific area, whereas, for a heat pump, the focus is on dumping heat into one particular area. A refrigerator (or heat pump) absorbs heat Qc from the cold reservoir at Kelvin temperature Tc and discards heat Qh to the hot reservoir at Kelvin temperature Th, while work W is done on the engine’s working substance.
A household refrigerator removes heat from...
A household refrigerator removes heat from...
3.0K
01:26Integration by Parts: Indefinite Integrals
189
Integration by parts is a fundamental technique in calculus for evaluating integrals involving the product of two functions. It is particularly useful when direct integration is not feasible. The method is based on the product rule for differentiation, which states that the derivative of a product equals the derivative of the first function times the second, plus the first function times the derivative of the second. By integrating this identity and rearranging terms, the integration by parts...
189
01:23Integration by Parts: Definite Integrals
87
Definite integrals involving the product of two functions over a fixed interval can be evaluated using integration by parts. This method rewrites the integral as the difference of a product evaluated at the endpoints and a remaining definite integral that is often simpler to compute.A representative example is the definite integral of the inverse tangent function. Since there is no direct integration formula for arctan x, the integrand is rewritten as a product of arctan x and the...
87