Magnetic materials for the microwave region

Heck, Carl

doi:10.1016/b978-0-408-70399-4.50017-x

Cited by 5 publications

(3 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Where K 0 is the energy to magnetise the easy axis, and φ is the angle between the direction of magnetization and the c-axis [150]. The higher order terms are not usually necessary for uniaxial ferrites, K o has a low value, as easy axis is a low energy orientation, and often the second order term is not required.…”

Section: Magnetic Properties Of M-type Hexaferritesmentioning

confidence: 99%

A Review on BaxSr1-xFe12O19 Hexagonal Ferrites for use in Electronic Devices

Pereira

Sombra

2013

SSP

View full text Add to dashboard Cite

The Ferrite term is used to refer to all magnetic oxides containing iron as major metallic component which has great to technological applications because of their ferromagnetic and insulating properties at room temperature. Among such ferrites, the hexagonal ones (hexaferrites) have long been used for permanent magnets and are of interest for microwave applications. The hexaferrite M-type has a structure built up from the S blocks interposed by the R block and are symbolically described as RSR*S*. In the last decades there has been great interest in the hexaferrites M-Type for applications as electronic components for mobile and wireless communications at microwave/GHz frequencies, electromagnetic wave absorbers for electromagnetic compatibility (EMC), radar absorting material (RAM) and stealth technologies and as composite materials. This review aimed study the structure, magnetic and dielectric properties of the hexaferrite BaxSr1-xFe12O19, which is a promising material for electronic devices and for small dielectric resonator antennas (MRA).The outline of this Review Paper is as follows:

show abstract

Section: Magnetic Properties Of M-type Hexaferritesmentioning

confidence: 99%

A Review on BaxSr1-xFe12O19 Hexagonal Ferrites for use in Electronic Devices

Pereira

Sombra

2013

SSP

View full text Add to dashboard Cite

show abstract

“…This importance is further emphasized in the context of permanent magnets, which are essential in many devices and systems. [ 1–7 ] Among recent advances in this area, magnetic nanofilms have attracted particular interest, particularly those that integrate hard and soft magnetic phases in an interphase configuration. [ 8,9 ] This approach aims to optimize the magnetic properties of permanent thin films, offering prospects for significant improvement in this area.…”

Section: Introductionmentioning

confidence: 99%

Exploration of the Magnetic Properties of ZrCo:Co Bilayer Films: Effects of the Thickness of the Co Layer on the Anisotropy and Magnetic Interaction Parameters

Fersi,

Apolo Palarizato

2024

Physica Status Solidi (a)

View full text Add to dashboard Cite

The analysis of ZrCo:Co films with varying Co layer thicknesses reveals distinctive magnetic properties and behaviors. Despite significant roughness, the films exhibit uniform surfaces and complete crystallization at the nanoscale. Magnetic studies show positive remanence anisotropy, decreased coercivity Hc and remanent magnetization Mr with increasing film thickness, along with a linear correlation between thickness and surface roughness. Exchange interactions between grains and layers influence magnetic properties. Ferromagnetic resonance analysis demonstrates a direct correlation between film thickness and magnetization orientation preference, notably at δCo = 200 nm. These findings underscore the critical role of film thickness in determining microstructural and magnetic properties, offering insights for magnetic device and nanotechnology applications. Understanding these relationships may lead to thickness‐tunable magnetic materials. This study uniquely explores ZrCo:Co films, delving into how their magnetic properties vary with Co layer thickness, revealing novel magnetic behaviors.

show abstract

“…However, it is only in recent times, with the advent of quantum mechanics and our understanding of the electron spin, that we have begun to unravel their intricate physical properties. These materials have garnered significant interest due to their wide range of technological applications, from everyday items like refrigerator magnets to complex devices such as electric motors, generators, sensors, and computer memories [1,2]. The magnetic behavior of materials stems from the presence of unpaired spin-electrons in atomic orbitals and the subsequent interaction between the magnetic moments of these atoms.…”

Section: Introductionmentioning

confidence: 99%

Systematic determination of a material's magnetic ground state from first principles

Mora,

He,

Bousquet

et al. 2023

Preprint

View full text Add to dashboard Cite

The characterization of magnetic materials necessitates a deep understanding of their magnetic phase. Knowledge of the magnetic ground state is essential to study magnetic excitations and other magnetic properties. In this work, we present a self-consistent method based on first-principles calculations to determine the magnetic ground state of materials, regardless of their dimensionality. Our methodology is founded on satisfying the stability conditions derived from the linear spin wave theory (LSWT) by optimizing the magnetic structure iteratively. We demonstrate the effectiveness of our method by successfully predicting the experimental magnetic structures of NiO, FePS3, and FeP. In each case, we compared our results with available experimental data and existing theoretical calculations reported in the literature. Furthermore, our methodology can be easily combined with phonon calculations, enabling a comprehensive approach to investigate magnons' influence on materials' thermal properties by computing the magnon/phonon coupling. Finally, we discuss the validity of the method and the possible extensions.

show abstract

Magnetic materials for the microwave region

Cited by 5 publications

References 64 publications

A Review on Ba<sub>x</sub>Sr<sub>1-x</sub>Fe<sub>12</sub>O<sub>19</sub> Hexagonal Ferrites for use in Electronic Devices

A Review on Ba<sub>x</sub>Sr<sub>1-x</sub>Fe<sub>12</sub>O<sub>19</sub> Hexagonal Ferrites for use in Electronic Devices

Exploration of the Magnetic Properties of ZrCo:Co Bilayer Films: Effects of the Thickness of the Co Layer on the Anisotropy and Magnetic Interaction Parameters

Systematic determination of a material's magnetic ground state from first principles

Contact Info

Product

Resources

About