Study of Oriented Polycrystalline Ferrites with Cubic Anisotropy

Autor:	C. F. Kooi, R. W. Moss, D. C. Stinson
Rok vydání:	1959
Předmět:	Condensed Matter::Materials Science Magnetic anisotropy Nuclear magnetic resonance Materials science Anisotropy energy Condensed matter physics Perpendicular General Physics and Astronomy Ferrite (magnet) Crystallite Anisotropy Microwave Magnetic field
Zdroj:	Journal of Applied Physics. 30:895-898
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1735259
Popis:	A study was made of crystallite orientation in cubic ferrites when pressed in a magnetic field. One easy axis orients in the field direction, the other easy axes lying at random in or near a perpendicular plane. Experimental torque curves have the theoretically predicted shape. The magnetic field required for microwave resonance is lower than in the same nonoriented ferrite if the axis of alignment and the field are parallel. This occurs because the anisotropy field Ha is no longer randomly oriented but helps to supply part of the resonant field requirement. Values of saturation magnetization (Ms), anisotropy energy (K), and resonant field (Hr) at 14 775 mc/sec were measured on a series of oriented polycrystalline nickel cobalt ferrites. Values of the measured resonant field are compared with values obtained from Kittel's resonance relation using the independently measured values of Ms and K.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8b44b0d44ddc12bf3b584789fbc13398 https://doi.org/10.1063/1.1735259 Zobrazit plný text záznamu