Hard ferrite magnetic insulators revealing giant coercivity and sub-terahertz natural ferromagnetic resonance at 5–300 K
Evgeny A. Gorbachev, Ekaterina S. Kozlyakova, Liudmila N. Alyabyeva, Asmaa Ahmed, Lev A. Trusov
Abstract
Temperature dependencies of magnetic properties of single-domain Al-substituted hexaferrite particles were investigated. The coercivity values and natural ferromagnetic resonance frequencies pass through maxima at 180 K, reaching 42 kOe and 297 GHz.
Topics & Concepts
CoercivityMaterials scienceFerrite (magnet)Terahertz radiationFerromagnetismFerromagnetic resonanceCondensed matter physicsMagnetic domainSingle domainNuclear magnetic resonanceAtmospheric temperature rangeResonance (particle physics)MagnetizationOptoelectronicsMagnetic fieldComposite materialPhysicsAtomic physicsMeteorologyQuantum mechanicsMagnetic Properties and Synthesis of FerritesMagnetic properties of thin filmsMultiferroics and related materials