2021-10-25

Scientists have discovered a new physical phenomenon: the complex braided structure composed of the schlemmings

By yqqlm yqqlm

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e05087b16003f2e - Scientists have discovered a new physical phenomenon: the complex braided structure composed of the schlemmings

threads and woven structures can be seen everywhere in daily life, from shoelaces to sweaters, From children’s braids to braided steel cables used to support countless bridges. These structures are also common in nature. For example, they can give tensile or flexural strength to plant fibers. Physicists at the eurich Research Center, together with researchers from Stockholm and China, found that this structure exists in nanoscale in alloys of iron and metallic germanium

these nanorings are composed of several sigmings, which are more or less intertwined, just like the strands of a rope. Each smirnon itself consists of magnetic moments pointing in different directions, and together presents the form of an elongated small vortex. The diameter of a single stringing strand is less than 1 micron. The length of the magnetic structure is limited only by the thickness of the sample; They extend from one surface of the sample to another

previous studies by other scientists showed that the filaments were basically linear and almost rod-shaped. However, the ultra-high resolution microscope investigation at the Ernst Ruska center in Ulrich and the theoretical research at the Peter Greenberg Institute in Ulrich reveal more different situations: these silk threads can actually be twisted together to varying degrees. According to the researchers, these complex shapes stabilize magnetic structures, making them particularly interesting in a range of applications

“mathematics contains a large variety of these structures. Now we know that this theoretical knowledge can be transformed into real physical phenomena,” reported Nikolai kiselev, a Ulrich physicist. “These types of structures inside magnetic solids show unique electrical and magnetic properties. However, further research is needed to verify this.”

in order to explain the differences between these studies and previous studies, the researchers point out that the analysis using ultra-high resolution electron microscopy does not just provide images of samples, for example, In the case of an optical microscope. This is because when high-energy electrons interact with electrons in the sample, quantum mechanical phenomena begin to play a role

“it is very feasible for other researchers to see these structures under the microscope, but they cannot explain them. This is because it is impossible to directly determine the magnetization direction distribution in the sample from the obtained data. On the contrary, it is necessary to establish a theoretical model of the sample and generate an electron microscope image from it,” kiselev explained. “If the theoretical and experimental images match, it can be concluded that the model can represent reality.”