About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films

The effect of impurity ions on nuclear magnetic relaxation has been considered. It is supposed that an impurity ion introduces an excess electron (or a hole). As a result, magnetic ions with strong spin-orbital interaction appear and magnetization direction distribution becomes inhomogeneous. Therma...

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Datum:2006
Hauptverfasser: Polulyakh, S.N., Sergeev, N.A.
Format: Artikel
Sprache:English
Veröffentlicht: НТК «Інститут монокристалів» НАН України 2006
Schriftenreihe:Functional Materials
Online Zugang:http://dspace.nbuv.gov.ua/handle/123456789/144373
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Zitieren:About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films / S.N. Polulyakh, N.A. Sergeev // Functional Materials. — 2006. — Т. 13, № 2. — С. 301-304. — Бібліогр.: 7 назв. — англ.

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spelling irk-123456789-1443732018-12-21T01:23:20Z About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films Polulyakh, S.N. Sergeev, N.A. The effect of impurity ions on nuclear magnetic relaxation has been considered. It is supposed that an impurity ion introduces an excess electron (or a hole). As a result, magnetic ions with strong spin-orbital interaction appear and magnetization direction distribution becomes inhomogeneous. Thermally activated jumps of the excess electron from one magnetic ion to another generate fluctuations in the magnetization direction. The interaction between the fluctuating magnetization and magnetic nuclei results in the appearance of regions of fast nuclear magnetic relaxation. Spin diffusion contributes to the longitudinal relaxation rate also for nuclei being outside the impurity regions. Taking into account the spin diffusion dependence on nuclear interactions, we have derive the dependence of longitudinal relaxation rate on nuclear interactions, what was observed experimentally in [1]. An assumption about unintentional technological impurities is sufficient to explain the experimental data. Рассматривается влияние примесных ионов на процессы ядерной магнитной релаксации. Предполагается, что примесный ион привносит избыточный электрон (или дырку). В результате появляются магнитные ионы с сильной спин-орбитальной связью и распределение направлений электронной намагниченности становится неоднородным. Термически активированные скачки избыточного электрона с одного магнитного иона на другой порождают флуктуации в направлении намагниченности. Взаимодействие между флуктуирующей намагниченностью и магнитными ядрами приводит к появлению областей с быстрой ядерной магнитной релаксацией. Благодаря спиновой диффузии возрастает скорость продольной релаксации и для ядер, находящихся вне примесных областей. Принимая во внимание зависимость интенсивности спиновой диффузии от ядерно-ядерных взаимодействий, получена зависимость скорости продольной релаксации от межядерных взаимодействий, что наблюдалось экспериментально в работе [1]. Предположение о наличии неконтролируемых технологических примесей является достаточным для объяснения экспериментальных результатов. Розглядається вплив домішок на процеси ядерної магнітної релаксації. Робиться припущення, що іон домішки надає надлишковий електрон (або дірку). Внаслідок цього з’являються магнітні іони із сильним спін-орбітальним зв’язком і розподіл напрямку електронної намагніченості стає неоднорідним. Термічно активовані стрибки надлишкового електрона з одного магнітного іона на іншій породжують флуктуації у напрямку намагніченості. Взаємодія між флуктуаціями намагніченості та магнітними ядрами призводить до появи регіонів зі швидкою ядерною магнітною релаксацією. Завдяки спіновій дифузії зростає швидкість подовжньої релаксації і для ядер, що знаходяться поза регіонами домішок. Приймаючи до уваги залежність інтенсивності спінової дифузії від ядерно-ядерних взаємодій, отримано залежність швидкості поздовжньої релаксації від взаємодій між ядрами, що спостерігалося експериментально у роботі [1]. Припущення про наявність неконтрольованих технологічних домішок є достатнім для пояснення експериментальних результатів. 2006 Article About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films / S.N. Polulyakh, N.A. Sergeev // Functional Materials. — 2006. — Т. 13, № 2. — С. 301-304. — Бібліогр.: 7 назв. — англ. 1027-5495 http://dspace.nbuv.gov.ua/handle/123456789/144373 en Functional Materials НТК «Інститут монокристалів» НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
description The effect of impurity ions on nuclear magnetic relaxation has been considered. It is supposed that an impurity ion introduces an excess electron (or a hole). As a result, magnetic ions with strong spin-orbital interaction appear and magnetization direction distribution becomes inhomogeneous. Thermally activated jumps of the excess electron from one magnetic ion to another generate fluctuations in the magnetization direction. The interaction between the fluctuating magnetization and magnetic nuclei results in the appearance of regions of fast nuclear magnetic relaxation. Spin diffusion contributes to the longitudinal relaxation rate also for nuclei being outside the impurity regions. Taking into account the spin diffusion dependence on nuclear interactions, we have derive the dependence of longitudinal relaxation rate on nuclear interactions, what was observed experimentally in [1]. An assumption about unintentional technological impurities is sufficient to explain the experimental data.
format Article
author Polulyakh, S.N.
Sergeev, N.A.
spellingShingle Polulyakh, S.N.
Sergeev, N.A.
About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
Functional Materials
author_facet Polulyakh, S.N.
Sergeev, N.A.
author_sort Polulyakh, S.N.
title About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
title_short About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
title_full About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
title_fullStr About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
title_full_unstemmed About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films
title_sort about the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷fe nuclei in yig films
publisher НТК «Інститут монокристалів» НАН України
publishDate 2006
url http://dspace.nbuv.gov.ua/handle/123456789/144373
citation_txt About the influence of nuclear interactions on longitudinal magnetic relaxation of ⁵⁷Fe nuclei in YIG films / S.N. Polulyakh, N.A. Sergeev // Functional Materials. — 2006. — Т. 13, № 2. — С. 301-304. — Бібліогр.: 7 назв. — англ.
series Functional Materials
work_keys_str_mv AT polulyakhsn abouttheinfluenceofnuclearinteractionsonlongitudinalmagneticrelaxationof57fenucleiinyigfilms
AT sergeevna abouttheinfluenceofnuclearinteractionsonlongitudinalmagneticrelaxationof57fenucleiinyigfilms
first_indexed 2025-07-10T19:16:41Z
last_indexed 2025-07-10T19:16:41Z
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