Nanowerk January 23, 2019 Until recently skyrmions were a phenomenon only observed at extreme low temperature. They need external magnetic fields to exist. A team of researchers in the US (Ames Laboratory, Oak Ridge National Laboratory, University of Florida) established a skyrmion lattice in a sample through exposure to magnetic fields and supercooling with liquid nitrogen. They were able to observe the skyrmion lattice in zero magnetic field, and then observe the decay of the skyrmions as the temperature warmed gaining critical new information about how skyrmions behave and how they revert to metastable state. The research provides a very solid […]
Tag Archives: Magnetism
Scientists predict superelastic properties in a group of iron-based superconductors
Science Daily August 30, 2018 By performing pressure simulations within density functional theory for the family of iron-based superconductors an international team of researchers (Germany, USA – Iowa State University) predicts that in these systems the appearance of two consecutive half-collapsed tetragonal transitions at pressures Pc1and Pc2. They identify clear trends of critical pressures and discuss the relevance of the collapsed phases in connection to magnetism and superconductivity. Not only does this study have implications for properties of magnetism and superconductivity, it may have much wider application in room-temperature elasticity… read more. TECHNICAL ARTICLE
Scientists find ordered magnetic patterns in disordered magnetic material
Science Daily June 8, 2018 A team of researchers in the US (Lawrence Berkeley National Laboratory, UC Berkeley) has generalized the concept of chirality driven by interfacial the Dzyaloshinskii–Moriya interaction (DMI) to complex multicomponent systems and demonstrated on the example of chiral ferrimagnetism in amorphous GdCo films. They found that 2 nm thick GdCo films preserve ferrimagnetism and stabilize chiral domain walls. The type of chiral domain walls depends on the rare‐earth composition/saturation magnetization. The success of the experiments opens the possibility of controlling some properties of domain walls, such as chirality, with temperature, and of switching a material’s chiral […]