The role of demagnetization factor in determining the ‘true’ value of the Curie temperature

Zverev, V. I.; Gimaev, Radel R.; Tishin, A.M.; Mudryk, Yaroslav; Gschneidner, K.A.; Pecharsky, V. K.

doi:10.1016/j.jmmm.2011.05.012

Cited by 34 publications

(25 citation statements)

References 15 publications

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“…In this work, the experiments were unified, i.e. we performed our measurements under the same conditions and the samples for the study had the same shape, thus enabling [17] precise determination of the changes in the magnetic state upon hydrogen absorption.…”

Section: Resultsmentioning

confidence: 99%

Magnetic phase diagrams of Gd-H, Tb-H, Dy-H systems

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Magnetic phase diagrams of Gd-H, Tb-H, Dy-H systems

et al. 2018

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“…Измере-ния МКЭ проводились косвенным методом. Проводился анализ полевых зависимостей намагниченности, как для определения МКЭ, так и для определения температуры Кюри с помощью метода Белова−Арротта [21].…”

Section: исследования магнитокалорических свойствunclassified

Влияние Структурных Неоднородностей И Газообразующих Примесей На Функциональные Свойства Высокочистых Редкоземельных Металлов

Чжан¹,

Терёшина²

2018

Физика Твердого Тела

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Rare-earth metals (REM) gadolinium and dysprosium, and also the Gd–H and Dy–H systems in which magnetic order–order and order–disorder phase transitions are accompanied by significant magnetocaloric effect, have been studied. The materials have been prepared in various structural states. It is stated that there is a substantial difference of their functional properties in the dependence on the features of the structural state and also on the existence of a gas-forming impurity. It has been proved experimentally and theoretically that the Curie temperatures of Gd samples with grain sizes of ~200 nm increases as a result of hydrogenation, while the magnetic phase transition temperatures of Dy are almost unchanged Inhomogeneities.

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“…31 The literature contains several alternative explanations of these tails. 5,16,18,[32][33][34] Depending on t, we find the theoretical spontaneous-magnetization behavior from the appropriate one of two possible situations. In Fig.…”

Section: Positive-feedback Model Of Spontaneous Magnetizationmentioning

confidence: 99%

Calculating the spontaneous magnetization and defining the Curie temperature using a positive-feedback model

Harrison

2014

Journal of Applied Physics

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A positive-feedback mean-field modification of the classical Brillouin magnetization theory provides an explanation of the apparent persistence of the spontaneous magnetization beyond the conventional Curie temperature-the little understood "tail" phenomenon that occurs in many ferromagnetic materials. The classical theory is unable to resolve this apparent anomaly. The modified theory incorporates the temperature-dependent quantum-scale hysteretic and mesoscopic domain-scale anhysteretic magnetization processes and includes the effects of demagnetizing and exchange fields. It is found that the thermal behavior of the reversible and irreversible segments of the hysteresis loops, as predicted by the theory, is a key to the presence or absence of the "tails." The theory, which permits arbitrary values of the quantum spin number J, generally provides a quantitative agreement with the thermal variations of both the spontaneous magnetization and the shape of the hysteresis loop.

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The role of demagnetization factor in determining the ‘true’ value of the Curie temperature

Cited by 34 publications

References 15 publications

Magnetic phase diagrams of Gd-H, Tb-H, Dy-H systems

Magnetic phase diagrams of Gd-H, Tb-H, Dy-H systems

Влияние Структурных Неоднородностей И Газообразующих Примесей На Функциональные Свойства Высокочистых Редкоземельных Металлов

Calculating the spontaneous magnetization and defining the Curie temperature using a positive-feedback model

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