Permanent Magnet Materials and Applications

Müller, K.‐H.; Sawatzki, Simon; Gauß, Roland; Gutfleisch, Oliver

doi:10.1007/978-3-030-63210-6_29

Cited by 3 publications

(2 citation statements)

References 164 publications

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“…The recoil permeability describes the steepness of the demagnetization curve in the B(H) explanation [12].…”

Section: • Magnetic Hysteresismentioning

confidence: 99%

Introductory Chapter: Modern Permanent Magnets – Basics and Applications

Ranjan Sahu

2024

Modern Permanent Magnets - Fundamentals and Applications

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“…The recoil permeability describes the steepness of the demagnetization curve in the B(H) explanation [12].…”

Section: • Magnetic Hysteresismentioning

confidence: 99%

Introductory Chapter: Modern Permanent Magnets – Basics and Applications

Ranjan Sahu

2024

Modern Permanent Magnets - Fundamentals and Applications

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“…Furthermore, MnBi has a positive temperature coefficient of coercivity, in such a way that µ 0 H C increases up to 2.5 T at 260 • C. The Curie temperature of MnBi is around 360 • C. These properties make this compound very competitive for use at high temperatures compared to FeNdB magnets, for instance. In addition, MnBi alloys have a very high uniaxial magnetic anisotropy field (µ 0 H K ), which is in the order of 5.5 T at room-temperature, and a theoretical maximum BH product in the order of 140 kJ/m 3 [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Bi Content on the Temperature of the Formation of the Hard Magnetic MnBi Phase: Simultaneous Irreversible Drop of Resistance

2022

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Pulsed laser-deposited (PLD) MnBi films were fabricated by alternating deposition of Mn and Bi layers. In order to obtain the ferromagnetic MnBi phase, heat treatments were performed on the samples. Simultaneously, the resistance of the samples was monitored as a function of the temperature. Thus, on increasing the temperature, a steep decrease in the resistance of the films was observed, simultaneous to the onset of the formation of the MnBi phase. At room-temperature, these annealed samples showed a ferromagnetic behavior, as well as the presence of the characteristic LT-MnBi phase diffraction peaks in the X-ray diffraction patterns. The temperature of the generation of the MnBi phase depended on the relative concentration of Mn and Bi in the different samples: on increasing the Bi atomic concentration, the temperature of the generation of the MnBi phase decreased.

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Unraveling the Magnetic Properties of NiO Nanoparticles: From Synthesis to Nanostructure

Moya,

Ara,

Labarta

et al. 2024

Magnetism

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NiO nanoparticles have garnered significant interest due to their diverse applications and unique properties, which differ markedly from their bulk counterparts. NiO nanoparticles are p-type semiconductors with a wide bandgap, high discharge capacity, and high carrier density, making them ideal for use in batteries, sensors, and catalysts. Their ability to generate reactive oxygen species also imparts disinfectant and antibiotic properties. Additionally, the higher Néel temperature of NiO compared with other antiferromagnetic materials makes it suitable for high-temperature applications in spintronic devices and industrial settings. This review focuses on the critical role of structure and composition in determining the magnetic properties of NiO nanoparticles. It examines how finite-size surface effects, morphology, crystallinity, and nickel distribution influence these properties. Fundamental physical properties and characterization techniques are discussed first. Various synthesis methods and their impact on NiO nanoparticle properties are then explored. Their magnetic phenomenology is examined in detail, highlighting the effects of finite size, particle composition and surface, and crystal quality. The review concludes with a summary of key insights and future research directions for optimizing NiO nanoparticles in technological applications.

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Permanent Magnet Materials and Applications

Cited by 3 publications

References 164 publications

Introductory Chapter: Modern Permanent Magnets – Basics and Applications

Introductory Chapter: Modern Permanent Magnets – Basics and Applications

Influence of Bi Content on the Temperature of the Formation of the Hard Magnetic MnBi Phase: Simultaneous Irreversible Drop of Resistance

Unraveling the Magnetic Properties of NiO Nanoparticles: From Synthesis to Nanostructure

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