Effects of the Fe3+/Sr2+molar ratio on the exchange-coupling of the composite and single-phase SrFe12O19

Autor:	Yuanfeng Xu, Yongqing Ma, Mingzai Wu, Guang Li, Zhenxiang Dai, F.L. Zan, Xian Zhang, Qian Ma, Ganhong Zheng
Rok vydání:	2013
Předmět:	Stress (mechanics) Materials science Field (physics) Remanence Molar ratio Composite number Analytical chemistry Coupling (piping) Coercivity Single phase Condensed Matter Physics Instrumentation Electronic Optical and Magnetic Materials
Zdroj:	The European Physical Journal Applied Physics. 62:10201
ISSN:	1286-0050 1286-0042
Popis:	It has been systematically investigated about the magnetic properties of the composite and single-phase SrFe 12 O 19 prepared with the precursor of different Fe 3+ /Sr 2+ molar ratios of 12:1, 11:1 and 10:1, respectively. With increasing the calcinations temperature, the coercivity of all samples decreases which can be determined by the stress model. The δm(H) results indicate that the intergrain exchangecoupling interaction exists both in composite and in single-phase SrFe 12 O 19 , resulting in the remanence magnetization enhancement, and the magnetostatic interaction become dominant in the samples with higher calcinations temperatures. The irreversible susceptibilities χ irr (H) curves show that there may exhibit the exchange-spring behavior in the composite SrFe 12 O 19 with more soft magnetic γ -Fe 2 O 3 , and the irreversible switching field may be qualitatively used to determine the coercivity magnitude.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::250a480847a4a73c2b17334d67465479 https://doi.org/10.1051/epjap/2013120267 Zobrazit plný text záznamu