Zobrazeno 1 - 10
of 559
pro vyhledávání: '"O. Leonov"'
Autor:
Andrey O. Leonov
Publikováno v:
Magnetism, Vol 4, Iss 2, Pp 91-103 (2024)
The structure of skyrmion and spiral solutions, investigated within the phenomenological Dzyaloshinskii model of chiral magnets near the ordering temperatures, is characterized by the strong interplay between longitudinal and angular order parameters
Externí odkaz:
https://doaj.org/article/02d8b4d047f74e2ab0cc07b73325168a
Autor:
Andrey O. Leonov
Publikováno v:
Nanomaterials, Vol 14, Iss 23, p 1970 (2024)
I revisit the well-known phase transition between the hexagonal skyrmion lattice and the homogeneous state within the phenomenological Dzyaloshinskii theory for chiral magnets, which includes only the exchange, Dzyaloshinskii–Moriya, and Zeeman ene
Externí odkaz:
https://doaj.org/article/2cc7d382d9684e1bb496d42d44d052c3
Autor:
Andrey O. Leonov
Publikováno v:
Magnetism, Vol 3, Iss 4, Pp 297-307 (2023)
Magnetic hopfions are three-dimensional topological solitons embedded into a homogeneously magnetized background. The internal structure of hopfions is distinguished by the linked preimages—closed loops with a single orientation of the magnetizatio
Externí odkaz:
https://doaj.org/article/801800c2a5e14b56af8d2f38dd49b7f6
Autor:
Andrey O. Leonov
Publikováno v:
Nanomaterials, Vol 14, Iss 18, p 1524 (2024)
I revisit the well-known structural transition between hexagonal and square skyrmion lattices and subsequent first-order phase transition into the tilted ferromagnetic state as induced by the increasing easy-plane anisotropy in quasi-two-dimensional
Externí odkaz:
https://doaj.org/article/3307e076954f4732a257de932ddf0a31
Autor:
Natsuki Mukai, Andrey O. Leonov
Publikováno v:
Nanomaterials, Vol 14, Iss 6, p 504 (2024)
We re-examine the internal structure of bimerons, which are stabilized in easy-plane chiral magnets and represent coupled states of two merons with the same topological charge |1/2| but with opposite vorticity and the polarity. We find that, in addit
Externí odkaz:
https://doaj.org/article/9972dc41740e431e8977216599960b3e
Autor:
Andrey O. Leonov, Catherine Pappas
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
We present a systematic study of tilted spiral states obtained theoretically within the classical Dzyaloshinskii model for magnetic states in cubic non-centrosymmetric ferromagnets. Such tilted spirals are shown to stabilize under the competing effec
Externí odkaz:
https://doaj.org/article/bbe6ca347cb044aaa1e41287b841540c
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033033 (2023)
The bulk helimagnet Cu_{2}OSeO_{3} represents a unique example in the family of B20 cubic helimagnets exhibiting a tilted spiral and skyrmion phase at low temperatures when the magnetic field is applied along the easy 〈001〉 crystallographic direc
Externí odkaz:
https://doaj.org/article/f1ff0d8c992b4dc9ba867542306f8a2f
Autor:
Takayuki Shigenaga, Andrey O. Leonov
Publikováno v:
Nanomaterials, Vol 13, Iss 14, p 2073 (2023)
The skyrmion Hall effect, which is regarded as a significant hurdle for skyrmion implementation in thin-film racetrack devices, is theoretically shown to be suppressed in wedge-shaped nanostructures of cubic helimagnets. Under an applied electric cur
Externí odkaz:
https://doaj.org/article/9674bee729bb421787ae62c2f3b70800
Publikováno v:
Вісник Харківського Національного Університету Імені В.Н. Каразіна: Серія Біологія, Vol 36, Pp 94-104 (2021)
Nowadays the interest of breeders, producers and consumers is going back to ancient wheat species, such as Triticum spelta, which are often considered as more valuable for healthy nutrition. In this light, we compared spelt cultivars and breeding lin
Externí odkaz:
https://doaj.org/article/a5a9f0be949d4a959d48123bdf2e8b5b
Autor:
Andrey O. Leonov, Ulrich K. Rößler
Publikováno v:
Nanomaterials, Vol 13, Iss 5, p 891 (2023)
Isolated chiral skyrmions are investigated within the phenomenological Dzyaloshinskii model near the ordering temperatures of quasi-two-dimensional chiral magnets with Cnv symmetry and three-dimensional cubic helimagnets. In the former case, isolated
Externí odkaz:
https://doaj.org/article/d1acf84dac604e01833a4bdc30efc7d7