ESR and Magnetization Studies of Bi-manganites

Singh, Ramesh; Ade, Ramesh

doi:10.5772/61936

Cited by 3 publications

(2 citation statements)

References 41 publications

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“…Однако окружение иона Mn 3+ в работе [22] неоктаэдрическое, поэтому векторы не могут быть использованы в расчетах настоящей работы. В настоящее время в работах по исследованию ЭПР-спектров в допированных манганитах, в том числе висмутсодержащих и зарядово-упорядоченных, пренебрегают данным видом взаимодействий [30]. Моделирование спектров спиновых волн и АФМР для ЗУФ манганитов с x = 1/2 также повторяло качественные характеристики экспериментальных зависимостей без учета ВДМ [15].…”

Section: магнитная структура и резонансные спектрыunclassified

Теоретическое Исследование Магнитно-Резонансных Спектров Псевдоперовскитных Фрустрированных Манганитов

Гончарь¹

2023

Оптика И Спектроскопия

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The magnetic resonance spectra of frustrated manganite compounds La1/3Ca2/3MnO3 and BiMnO3 are calculated within the framework of orbitally dependent magnetic interactions model. The aim of the paper is an investigation of orbital structure influence and superexchange interactions’ competition effects on ferromagnetic or antiferromagnetic resonance spectra of these compounds. The description of the features of the resonance lower branches’ dependencies on the magnitude and direction of the magnetic field is proposed. It is shown that the main influence on the symmetry of dependencies is exerted by single-ion anisotropy of the Mn3+ ion, associated not only with the orbital structure, but also with the tilting distortions of oxygen octahedrons around the ions

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Section: магнитная структура и резонансные спектрыunclassified

Теоретическое Исследование Магнитно-Резонансных Спектров Псевдоперовскитных Фрустрированных Манганитов

Гончарь¹

2023

Оптика И Спектроскопия

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“…Finally, the importance of spin-lattice coupling near a critical point of strongly correlated magnetic systems is discussed in section 4 with possible new directions of research. This review highlights the recent theoretical developments that have been made jointly by our group [51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Magnetoelastic coupling and critical behavior of some strongly correlated magnetic systems

Dutta¹

2022

J. Phys.: Condens. Matter

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The strongly correlated magnetic systems are attracting continuous attention in current condensed matter research due to their very compelling physics and promising technological applications. Being a host to charge, spin, and lattice degrees of freedom, such materials exhibit a variety of phases, and investigation of their physical behavior near such a phase transition bears an immense possibility. This review summarizes the recent progress in elucidating the role of magnetoelastic coupling on the critical behavior of some technologically important class of strongly correlated magnetic systems such as perovskite magnetites, uranium ferromagnetic superconductors, and multiferroic hexagonal manganites. It begins with encapsulation of various experimental findings and then proceeds toward describing how such experiments motivate theories within the Ginzburg-Landau phenomenological picture in order to capture the physics near a magnetic phase transition of such systems. The theoretical results that are obtained by implementing Wilson's renormalization-group to nonlocal Ginzburg-Landau model Hamiltonians are also highlighted. A list of possible experimental realizations of the coupled model Hamiltonians elucidates the importance of spin-lattice coupling near a critical point of strongly correlated magnetic systems.

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Large magnetic anisotropy in highly strained epitaxial MgFe2O4 thin films

Ade

Chen

Huang

et al. 2020

Journal of Applied Physics

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In order to acquire a soft magnetic film with low conductivity and large magnetic anisotropy, the strain-modulated magnetic anisotropy is studied in epitaxial MgFe2O4 (MFO) films. The MFO films with thicknesses of 25, 48, 75, and 110 nm are grown on the MgAl2O4 (MAO) (100) substrate using a pulsed laser deposition technique. Due to the large lattice-mismatch (3.34%) between MFO and MAO substrates, the interface exhibits a large tetragonal compressive strain. The results of field-dependent magnetization suggest the soft magnetic nature of all the measured MFO films. The analysis of angular dependent ferromagnetic resonance reveals the large uniaxial magnetic anisotropy energy (Ku) of −1.62 × 106 erg/cm3 in the highly strained 25 nm film, and Ku decreases with the increasing thickness due to strain relaxation. The observed large magnetic anisotropy in these highly strained MFO thin films is larger than most of the soft ferrite thin films, which arise due to tetragonal distortion and inverse magnetostriction. The epitaxial MFO thin films with enhanced magnetic anisotropy could be one of the potential candidates for spin filters.

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ESR and Magnetization Studies of Bi-manganites

Cited by 3 publications

References 41 publications

Теоретическое Исследование Магнитно-Резонансных Спектров Псевдоперовскитных Фрустрированных Манганитов

Теоретическое Исследование Магнитно-Резонансных Спектров Псевдоперовскитных Фрустрированных Манганитов

Magnetoelastic coupling and critical behavior of some strongly correlated magnetic systems

Large magnetic anisotropy in highly strained epitaxial MgFe2O4 thin films

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