najoNanosystems: Physics, Chemistry, MathematicsНаносистемы: физика, химия, математика2220-80542305-7971Университет ИТМО10.17586/2220-8054-2024-15-1-55-59najo-49Research ArticlePHYSICSФИЗИКАThe structure of magnetic domain walls in cylindrical nanoand microwires with inhomogeneous anisotropyСтруктура магнитных доменных границ в цилиндрических нано- и микропроводах с неоднородной анизотропиейhttps://orcid.org/0000-0002-6921-6075ЧичайК. А.ChichayK. A.

Ksenia A. Chichay – Department of Physics.

St. Petersburg, 197101

ks.chichay@gmail.comhttps://orcid.org/0000-0001-8789-3267ЛобановИ. С.LobanovI. S.

Igor S. Lobanov – Department of Physics.

St. Petersburg, 197101

lobanov.igor@gmail.comhttps://orcid.org/0000-0002-9505-0996УздинВ. М.UzdinV. M.

Valery M. Uzdin – Department of Physics.

St. Petersburg, 197101

vuzdin@mail.ruITMO UniversityRussian Federation2024310520251515559Copyright © Chichay K.A., Lobanov I.S., Uzdin V.M., 20252025Чичай К.А., Лобанов И.С., Уздин В.М.Chichay K.A., Lobanov I.S., Uzdin V.M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://nanojournal.ifmo.ru/jour/article/view/49

The structure of domain walls in cylindrical nanoand microwires with a non-uniform anisotropy distribution in the transverse-radial direction has been studied. This distribution can be controlled by mechanical stresses associated with specific wire manufacturing methods as well as with the glass coating in some types of microwires. Our calculations have shown that in the presence of axial anisotropy in the core of the wire and radial anisotropy near its surface, various configurations of domain walls can be stabilized. A diagram of magnetic states has been calculated depending on the radial anisotropy values. The stability of various types of domain walls and their possible transformation under the excitation of thermal fluctuations and external perturbations are discussed.

Исследована структура доменных границ в цилиндрических нано- и микропроводах с неоднородным распределением анизотропии в поперечно-радиальном направлении. Это распределение может контролироваться механическими напряжениями, связанными с конкретными методами изготовления проводов, а также со стеклянным покрытием в некоторых типах микропроводов. Проведенные расчеты показали, что при наличии осевой анизотропии в сердцевине провода и радиальной анизотропии вблизи его поверхности возможна стабилизация различных конфигураций доменных границ. Рассчитана диаграмма магнитных состояний в зависимости от значений радиальной анизотропии. Обсуждается устойчивость различных типов доменных границ и их возможная трансформация при возбуждении тепловых флуктуаций и внешних возмущений.

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The authors declare that there are no conflicts of interest present.