Modifying Critical Exponents of Magnetic Phase Transitions via Nanoscale Materials Design

Fallarino, Lorenzo; Rojo, Eva López; Quintana, Mikel; Gallo, Juan Sebastián Salcedo; Kirby, Brian J.; Berger, Andreas

doi:10.1103/physrevlett.127.147201

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…В последние несколько лет в зарубежной литературе, посвященной исследованию магнитных материалов и сплавов, можно встретить термин " Graded Magnetic Materials" или градиентные магнитные материалы (ГММ), это материалы, которые проявляют пространственно-зависящие магнитные свойства (см., например, обзор [1] и ссылки в нем, а также работу [2]). ГММ привлекают внимание исследователей как с фундаментальной, так и с прикладной точек зрения, потому что путем подбора профилей распределения состава по глубине становится возможным контролировать обменное взаимодействие и соответствующие эффективные или локальные температуры Кюри на масштабах нескольких нанометров [1,3,4]. Одним из интересных направлений исследования магнитных материалов с пространственно-модулированными магнитными свойствами является изучение тонких ферромагнитных пленок, в которых наблюдаются возбуждение и распространение спиновых волн (магнонов), интересных сегодня для практических приложений в магнонной спинтронике [5][6][7].…”

Section: Introductionunclassified

Пленка сплава Pd-Fe с большим градиентом магнитной примеси: структурные и магнитные свойства

Янилкин¹,

Гумаров²,

Головчанский³

et al. 2023

Журнал Технической Физики

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An epitaxial film of the Pd-Fe alloy 116 nm thick with an iron concentration varying in depth from 2 at.% to 50 at.% has been synthesized. An experimental depth distribution profile of iron was obtained as a result of stepwise etching of the film surface with Ar+ ions. Profiling showed that, as a result of annealing, the impurity was redistributed in the film, and a layer of the L10-phase with a constant concentration was formed near the film surface. After removal of the L10-phase, the film exhibits easy-plane anisotropy. The study of spin-wave resonance spectra showed the presence of several modes of standing spin waves, the number of which depends on the residual film thickness.

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Section: Introductionunclassified

Пленка сплава Pd-Fe с большим градиентом магнитной примеси: структурные и магнитные свойства

Янилкин¹,

Гумаров²,

Головчанский³

et al. 2023

Журнал Технической Физики

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“…In the last few years, in scientific literature related to the study of magnetic materials and alloys, one can meet the term " Graded Magnetic Materials" (GMM), these are materials that exhibit spatially dependent magnetic properties (see, for example, an review [1] and references therein, and a paper [2]). GMMs attract the attention of researchers from both fundamental and applied points of view, because by selecting profiles of composition distribution through depth it becomes possible to control the exchange interaction and the corresponding effective or local Curie temperatures on scales of several nanometers [1,3,4]. One of the interesting directions in the study of magnetic materials with spatially modulated magnetic properties is the study of thin ferromagnetic films, in which the excitation and propagation of spin waves (magnons), which are of interest today for practical applications in magnon spintronics, are observed [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Pd-Fe alloy film with high magnetic gradient: structural and magnetic properties

et al. 2023

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An epitaxial film of the Pd-Fe alloy 116 nm thick with an iron concentration varying in depth from 2 at.% to 50 at.% has been synthesized. An experimental depth distribution profile of iron was obtained as a result of stepwise etching of the film surface with Ar+ ions. Profiling has shown that, as a result of annealing, the impurity was redistributed in the film, and a layer of the L10-phase with a constant concentration was formed near the film surface. After removal of the L10-phase, the film exhibits "easy-plane" anisotropy. The study of spin-wave resonance spectra showed the presence of several modes of standing spin waves, the number of which depends on the residual film thickness. Keywords: graded magnetic materials, molecular beam epitaxy, palladium-iron alloys, X-ray diffraction, spin-wave resonance.

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“…However, this approach is limited by the material system. Overcoming this challenge is motivated by a surge of interest in the material nanoengineering …”

mentioning

confidence: 99%

“…Overcoming this challenge is motivated by a surge of interest in the material nanoengineering. 15 Nanoengineering oxide thin films provides a wealth of exotic phases and emergent phenomena through interfacial coupling, thickness, strain, etc. 16−20 Via utilizing cooperative atomic displacements imposed by interface engineering, a long-range order of the material can be artificially constructed to give rise to plenty of nontrivial and inequivalent states of matter: e.g., room-temperature polar metals 18,21 and single-phase multiferroics.…”

mentioning

confidence: 99%

Hierarchically Engineered Manganite Thin Films with a Wide-Temperature-Range Colossal Magnetoresistance Response

et al. 2023

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Colossal magnetoresistance is of great fundamental and technological significance in condensed-matter physics, magnetic memory, and sensing technologies. However, its relatively narrow working temperature window is still a severe obstacle for potential applications due to the nature of the material-inherent phase transition. Here, we realized hierarchical La0.7Sr0.3MnO3 thin films with well-defined (001) and (221) crystallographic orientations by combining substrate modification with conventional thin-film deposition. Microscopic investigations into its magnetic transition through electron holography reveal that the hierarchical microstructure significantly broadens the temperature range of the ferromagnetic–paramagnetic transition, which further widens the response temperature range of the macroscopic colossal magnetoresistance under the scheme of the double-exchange mechanism. Therefore, this work puts forward a method to alter the magnetic transition and thus to extend the magnetoresistance working window by nanoengineering, which might be a promising approach also for other phase-transition-related effects in functional oxides.

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Modifying Critical Exponents of Magnetic Phase Transitions via Nanoscale Materials Design

Cited by 7 publications

References 30 publications

Пленка сплава Pd-Fe с большим градиентом магнитной примеси: структурные и магнитные свойства

Пленка сплава Pd-Fe с большим градиентом магнитной примеси: структурные и магнитные свойства

Pd-Fe alloy film with high magnetic gradient: structural and magnetic properties

Hierarchically Engineered Manganite Thin Films with a Wide-Temperature-Range Colossal Magnetoresistance Response

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