Matches in SemOpenAlex for { <https://semopenalex.org/work/W2936951021> ?p ?o ?g. }
- W2936951021 endingPage "150" @default.
- W2936951021 startingPage "142" @default.
- W2936951021 abstract "γ-Fe2O3 nanoparticles were dispersed in a mesoporous silica (SBA15) matrix using the co-precipitation method. While structural properties were investigated by X-ray diffraction, X-ray photoelectron spectroscopy, micro-Raman and transmission electron microscopy, magnetic studies were performed with DC and AC magnetometry. The γ-Fe2O3 nanoparticles have the regular cubic spinel structure. A strong reduction in the saturation magnetization (∼30 emu/gFe, 300 K) was measured and can be mainly attributed to the large fraction (60%) of surface spin disorder. This phenomenon was studied using the modified Kneller’s law and a modified Bloch spin wave model with a surface disorder term. Values of spin wave stiffness constant D of 391 meVÅ2 and exchange integral Jex equal to 1.12 meV were obtained, suggesting the presence of a block spinel ferrimagnetic state. The Vogel-Fulcher relation was applied to study the nanoparticles magnetic interactions. The values of zv = 5.3 (5), Tf = 184 K and τ0=10-12s suggest a superspinglass behavior. Thermoremanent experiments have also shown that magnetic relaxation occurs even below Tf (180 K) with an exponential decay with scale parameters in the range from 0.56 to 0.6, in agreement with the slowing down law. These facts indicate that the superspinglass effect is mainly caused by the strong surface spin disorder and frustrated collective state related to an interacting system with a broad particle size distribution." @default.
- W2936951021 created "2019-04-25" @default.
- W2936951021 creator A5008152215 @default.
- W2936951021 creator A5024782240 @default.
- W2936951021 creator A5040424475 @default.
- W2936951021 creator A5052711998 @default.
- W2936951021 creator A5091190645 @default.
- W2936951021 date "2019-09-01" @default.
- W2936951021 modified "2023-09-27" @default.
- W2936951021 title "Superspinglass behavior of maghemite nanoparticles dispersed in mesoporous silica" @default.
- W2936951021 cites W139500340 @default.
- W2936951021 cites W1657032047 @default.
- W2936951021 cites W1976927697 @default.
- W2936951021 cites W1983378088 @default.
- W2936951021 cites W1984967932 @default.
- W2936951021 cites W2000467880 @default.
- W2936951021 cites W2007726862 @default.
- W2936951021 cites W2012454870 @default.
- W2936951021 cites W2014777534 @default.
- W2936951021 cites W2023279524 @default.
- W2936951021 cites W2038053967 @default.
- W2936951021 cites W2038619507 @default.
- W2936951021 cites W2040329045 @default.
- W2936951021 cites W2046230201 @default.
- W2936951021 cites W2063627396 @default.
- W2936951021 cites W2068903106 @default.
- W2936951021 cites W2072749433 @default.
- W2936951021 cites W2080681812 @default.
- W2936951021 cites W2084356438 @default.
- W2936951021 cites W2089340480 @default.
- W2936951021 cites W2111547163 @default.
- W2936951021 cites W2113408736 @default.
- W2936951021 cites W2314146458 @default.
- W2936951021 cites W2325413701 @default.
- W2936951021 cites W2341615663 @default.
- W2936951021 cites W2347093460 @default.
- W2936951021 cites W2367885421 @default.
- W2936951021 cites W2474706873 @default.
- W2936951021 cites W2503719002 @default.
- W2936951021 cites W2552215903 @default.
- W2936951021 cites W2553506413 @default.
- W2936951021 cites W2576358412 @default.
- W2936951021 cites W2620892401 @default.
- W2936951021 cites W2742891476 @default.
- W2936951021 cites W2770312871 @default.
- W2936951021 cites W2875051083 @default.
- W2936951021 cites W2890058265 @default.
- W2936951021 cites W292851737 @default.
- W2936951021 cites W2951168107 @default.
- W2936951021 cites W3027575401 @default.
- W2936951021 cites W3103572098 @default.
- W2936951021 doi "https://doi.org/10.1016/j.jmmm.2019.04.067" @default.
- W2936951021 hasPublicationYear "2019" @default.
- W2936951021 type Work @default.
- W2936951021 sameAs 2936951021 @default.
- W2936951021 citedByCount "12" @default.
- W2936951021 countsByYear W29369510212020 @default.
- W2936951021 countsByYear W29369510212021 @default.
- W2936951021 countsByYear W29369510212022 @default.
- W2936951021 countsByYear W29369510212023 @default.
- W2936951021 crossrefType "journal-article" @default.
- W2936951021 hasAuthorship W2936951021A5008152215 @default.
- W2936951021 hasAuthorship W2936951021A5024782240 @default.
- W2936951021 hasAuthorship W2936951021A5040424475 @default.
- W2936951021 hasAuthorship W2936951021A5052711998 @default.
- W2936951021 hasAuthorship W2936951021A5091190645 @default.
- W2936951021 hasConcept C113196181 @default.
- W2936951021 hasConcept C115260700 @default.
- W2936951021 hasConcept C120665830 @default.
- W2936951021 hasConcept C121332964 @default.
- W2936951021 hasConcept C155672457 @default.
- W2936951021 hasConcept C171250308 @default.
- W2936951021 hasConcept C185592680 @default.
- W2936951021 hasConcept C191897082 @default.
- W2936951021 hasConcept C192562407 @default.
- W2936951021 hasConcept C26873012 @default.
- W2936951021 hasConcept C2776230739 @default.
- W2936951021 hasConcept C2780786144 @default.
- W2936951021 hasConcept C32546565 @default.
- W2936951021 hasConcept C40003534 @default.
- W2936951021 hasConcept C43617362 @default.
- W2936951021 hasConcept C46141821 @default.
- W2936951021 hasConcept C62520636 @default.
- W2936951021 hasConcept C779372 @default.
- W2936951021 hasConceptScore W2936951021C113196181 @default.
- W2936951021 hasConceptScore W2936951021C115260700 @default.
- W2936951021 hasConceptScore W2936951021C120665830 @default.
- W2936951021 hasConceptScore W2936951021C121332964 @default.
- W2936951021 hasConceptScore W2936951021C155672457 @default.
- W2936951021 hasConceptScore W2936951021C171250308 @default.
- W2936951021 hasConceptScore W2936951021C185592680 @default.
- W2936951021 hasConceptScore W2936951021C191897082 @default.
- W2936951021 hasConceptScore W2936951021C192562407 @default.
- W2936951021 hasConceptScore W2936951021C26873012 @default.
- W2936951021 hasConceptScore W2936951021C2776230739 @default.
- W2936951021 hasConceptScore W2936951021C2780786144 @default.
- W2936951021 hasConceptScore W2936951021C32546565 @default.
- W2936951021 hasConceptScore W2936951021C40003534 @default.