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Zakharov, Y. V.
Negative magnetoresistance of iron single-crystal whiskers in the course of magnetization reversal / Y. V. Zakharov, L. S. Titov // Phys. Solid State. - 2004. - Vol. 46, Is. 2. - P. 303-305, DOI 10.1134/1.1649428. - Cited References: 9 . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
RESISTIVITY
WALLS
Аннотация: The change in the low-temperature resistance of iron single-crystal whiskers during magnetization reversal form a single-domain state to a state with a plane-parallel domain structure is studied theoretically. The negative magnetoresistance (similar to45%) is calculated from the Kubo formula with due regard for the change in the trajectories of conduction electrons in a magnetic induction field of domains. The magnetoresistance thus calculated is of the same order of magnitude as the magnetoresistance obtained in the experiment performed by Isin and Coleman.(C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
Krasnoyarsk State Univ, Krasnoyarsk 660062, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Krasnoyarsk State University, Svobodnyi pr. 79, Krasnoyarsk 660062, Russian Federation

Доп.точки доступа:
Titov, L. S.
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    Krakhalev, M. N.
    Oblique light incidence method to study topological defects in nematic layers with conical boundary conditions / M. N. Krakhalev // Sci. Rep. - 2021. - Vol. 11, Is. 1. - Ст. 17433, DOI 10.1038/s41598-021-96784-9. - Cited References: 54 . - ISSN 2045-2322
   Перевод заглавия: Метод наклонного падения света для исследования топологических дефектов в нематических слоях с коническими граничными условиями

РУБ Multidisciplinary Sciences
Рубрики:
CHOLESTERIC FINGERS
   DISCLINATIONS
   SURFACE
   WALLS
   ORDER
Аннотация: A polarization microscopy method to investigate the orientational structures and boojums formed in the chiral and achiral nematic layers under conical (tilted) boundary conditions has been developed. Oblique light incidence on nematic layer is used, due to which the phase difference between the ordinary and extraordinary waves depends on the director’s azimuthal angle. The phase difference gets maximal when the director azimuthal angle of achiral nematic φ(x,y)=0 and an azimuthal angle at the center of the chiral nematic layer φ0(x,y)=0 independently of the total twist angle φTOTAL. It has been found that the m=+1 boojums with the phase ξ=±90° and ξ=(−90°+φTOTAL/2) are formed in achiral and chiral nematics, respectively, at the director tilt angle θd/2≅40° at the interface. In addition, the defectless structure of chiral nematic with the periodically variable azimuthal director angle on the substrates has been studied.

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Держатели документа:
Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Крахалев, Михаил Николаевич
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