Hard ferrite magnetic insulators revealing giant coercivity and sub-terahertz natural ferromagnetic resonance at 5–300 K
Journal article published in 2023 by
Evgeny A. Gorbachev 
,
Ekaterina S. Kozlyakova ,
Liudmila N. Alyabyeva ,
Asmaa Ahmed,
Lev A. Trusov
,
Ekaterina S. Kozlyakova ,
Liudmila N. Alyabyeva ,
Asmaa Ahmed,
Lev A. Trusov
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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.