Year: 2002
Type: article
Abstract: cs, Russian Aca dem y of SciencesCherno gol o vk a, RussiaStr uctur e and ma gnet ic pr op ertie s of the therma l decomp osition pro ducts of F e(I II )C o(I I) acr ylate comple x were analysed .T he crystallin e phases, w hich w ere found in the fully pro cessed material, at 643 K , w ere F e3 O4 , C oFe2 O4 , and CoO and had a mean particle size of ab out 30 nm.In the intermediate stages of the thermolysi s iron was present in a form of Fe I I I (tri v alent low -spin iron), F e 2 + (div alent high-spin iron), and F e3 O4 .T he coercivity and remanence were measured versus temp erature in the range of 5{300 K , in 1.1 T applied Ùeld.Both, M H c and M r , decreased show ing ro om temp erature v alues of 0.038 T and 7.49 mT , for coercivity and remanence, resp ectively .A t temp eratures below 200 K the hysteresis loops w ere asymmetrical, op ened and shif ted tow ards negative Ùeld values.
Source: Acta Physica Polonica A
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1678201652