КФУ. Карточка публикации. Ultrafast signatures of magnetic inhomogeneity in Pd1-xFex (x <= 0.08) epitaxial thin films

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ULTRAFAST SIGNATURES OF MAGNETIC INHOMOGENEITY IN PD1-XFEX (X <= 0.08) EPITAXIAL THIN FILMS

Форма представления

Статьи в зарубежных журналах и сборниках

Год публикации

2022

Язык

английский

Авторы, сотрудники КФУ

Гумаров Амир Илдусович, автор

Никитин Сергей Иванович, автор

Петров Андрей Вячеславович, автор

Тагиров Ленар Рафгатович, автор

Юсупов Роман Валерьевич, автор

Янилкин Игорь Витальевич, автор

Библиографическое описание на языке оригинала

Petrov AV, Nikitin SI, Tagirov LR, Ultrafast signatures of magnetic inhomogeneity in Pd1-xFex (x <= 0.08) epitaxial thin films//BEILSTEIN JOURNAL OF NANOTECHNOLOGY. - 2022. - Vol.13, Is.. - P.836-844.

Аннотация

A series of Pd1−xFex alloy epitaxial films (x = 0, 0.038, 0.062, and 0.080), a material promising for superconducting spintronics, was prepared and studied with ultrafast optical and magneto-optical laser spectroscopy in a wide temperature range of 4–300 K. It was found that the transition to the ferromagnetic state causes a qualitative change of both the reflectivity and the magneto-optical Kerr effect transients. A nanoscale magnetic inhomogeneity of the ferromagnet/paramagnet type inherent in the palladium-rich Pd1−xFex alloys reveals itself through the occurrence of a relatively slow, 10–25 ps, photoinduced demagnetization component following a subpicosecond one; the former vanishes at low temperatures only in the x = 0.080 sample. We argue that the 10 ps timescale demagnetization originates most probably from the diffusive transport of d electrons under the condition of nanoscale magnetic inhomogeneities. The low-temperature fraction of the residual paramagnetic phase can be deduced from the magnitude of the slow reflectivity relaxation component. It is estimated as ≈30% for x = 0.038 and ≈15% for x = 0.062 films. The minimal iron content ensuring the magnetic homogeneity of the ferromagnetic state in the Pd1−xFex alloy at low temperatures is about 7–8 atom %.

Ключевые слова

magnetic inhomogeneities; PdFe alloy; thin epitaxial films; time-resolved magneto-optical Kerr effect; time-resolved optical spectroscopy

Название журнала

BEILSTEIN JOURNAL OF NANOTECHNOLOGY

URL

https://www.beilstein-journals.org/bjnano/articles/13/74

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https://repository.kpfu.ru/?p_id=272172

Полная запись метаданных

Поле DC	Значение	Язык
dc.contributor.author	Гумаров Амир Илдусович	ru_RU
dc.contributor.author	Никитин Сергей Иванович	ru_RU
dc.contributor.author	Петров Андрей Вячеславович	ru_RU
dc.contributor.author	Тагиров Ленар Рафгатович	ru_RU
dc.contributor.author	Юсупов Роман Валерьевич	ru_RU
dc.contributor.author	Янилкин Игорь Витальевич	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Petrov AV, Nikitin SI, Tagirov LR, Ultrafast signatures of magnetic inhomogeneity in Pd1-xFex (x <= 0.08) epitaxial thin films//BEILSTEIN JOURNAL OF NANOTECHNOLOGY. - 2022. - Vol.13, Is.. - P.836-844.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/?p_id=272172	ru_RU
dc.description.abstract	BEILSTEIN JOURNAL OF NANOTECHNOLOGY	ru_RU
dc.description.abstract	A series of Pd1−xFex alloy epitaxial films (x = 0, 0.038, 0.062, and 0.080), a material promising for superconducting spintronics, was prepared and studied with ultrafast optical and magneto-optical laser spectroscopy in a wide temperature range of 4–300 K. It was found that the transition to the ferromagnetic state causes a qualitative change of both the reflectivity and the magneto-optical Kerr effect transients. A nanoscale magnetic inhomogeneity of the ferromagnet/paramagnet type inherent in the palladium-rich Pd1−xFex alloys reveals itself through the occurrence of a relatively slow, 10–25 ps, photoinduced demagnetization component following a subpicosecond one; the former vanishes at low temperatures only in the x = 0.080 sample. We argue that the 10 ps timescale demagnetization originates most probably from the diffusive transport of d electrons under the condition of nanoscale magnetic inhomogeneities. The low-temperature fraction of the residual paramagnetic phase can be deduced from the magnitude of the slow reflectivity relaxation component. It is estimated as ≈30% for x = 0.038 and ≈15% for x = 0.062 films. The minimal iron content ensuring the magnetic homogeneity of the ferromagnetic state in the Pd1−xFex alloy at low temperatures is about 7–8 atom %.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	Ultrafast signatures of magnetic inhomogeneity in Pd1-xFex (x <= 0.08) epitaxial thin films	ru_RU
dc.type	Статьи в зарубежных журналах и сборниках	ru_RU