Studies of Magnetic Structure of Cobalt-ferrite Nano-particles

T.M. Meaz; Mohamed Amer; M. K. El‐Nimr; A Morrish; K Haenda; J Coey; A Ochi; K Watanabe; M Kiyama; T Shinjo; Y Bando; T Takada; J Na; J Zaho; A Berkowitz; J Lahut; C Vanburen; H Rechnberg; F Tourinho; S Gangopadhyay; Y Yang; G Hahjipanayis; V Papaefthymiu; C Sornsen; K Klabunde; D Han; J Wang; Y Feng; H Luo; M Soler; S Da Silva; V Garg; A Olivera; R Azevedo; A Pimenta; E Lima; P Morais; G Ji; S Tang; S Ren; F Zhang; B Gu; Y Du; L Tung; V Kolesnichenko; D Caruntu; N Chou; C O'connor; L Spinu; S Ahmed; S Ogale; P Kofins; M Rajendran; R Pullar; A Bhattacharya; D Das; S Chintalapudi; C Majumdar; A Slawska-Waniewska; P Didukh; J Greneche; P Fannin; V Masheva; M Grigorova; N Valkov; H Blythe; T Midlarz; V Blaskov; J Geshev; M Mikhov; Y Ahn; E Choi; S Kim; H; Nam Ok; K Davies; S Wells; R Upadhyay; S Charles; K O ' Grady; M Hilo; T; S Mrup; G Da Costa; E De Grave; A Bryan; L Bowen

doi:10.21608/ejs.2008.148828

JOURNAL ARTICLE

Studies of Magnetic Structure of Cobalt-ferrite Nano-particles

T.M. Meaz Mohamed Amer M. K. El‐Nimr A Morrish K Haenda J Coey A Ochi K Watanabe M Kiyama T Shinjo Y Bando T Takada J Na D Han J Zaho H Luo A Berkowitz J Lahut C Vanburen H Rechnberg F Tourinho S Gangopadhyay Y Yang G Hahjipanayis V Papaefthymiu C Sornsen K Klabunde D Han J Wang Y Feng H Luo K Davies S Wells S Charles M Soler S Da Silva V Garg A Olivera R Azevedo A Pimenta E Lima P Morais G Ji S Tang S Ren F Zhang B Gu Y Du L Tung V Kolesnichenko D Caruntu N Chou C O'connor L Spinu S Ahmed S Ogale P Kofins M Rajendran R Pullar A Bhattacharya D Das S Chintalapudi C Majumdar A Slawska-Waniewska P Didukh J Greneche P Fannin V Masheva M Grigorova N Valkov H Blythe T Midlarz V Blaskov J Geshev M Mikhov Y Ahn E Choi S Kim H Nam Ok K Davies S Wells R Upadhyay S Charles K O ' Grady M Hilo T S Mrup G Da Costa E De Grave A Bryan L Bowen

Year: 2008 Journal: Egyptian journal of solids Vol: 31 (1)Pages: 147-156

DOI: 10.21608/ejs.2008.148828

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Abstract

By means of Mössbauer effect spectroscopy, ultrafine cobalt-ferrite particles was studied.The spectra were obtained between 14 K and 300 K, and also at 5 K with 4 T applied external magnetic field.The spectra obtained with large magnetic fields demonstrated the non-collinear magnetic structure occurs in the surface layers of the Co-ferrite system.The importance of the applied field during the measurements for a correct characterization and the coating effect were shown.The measurements illustrated that coating the surface of Co-Fe 2 O 4 particles with oleic acid does not necessarily explain the canting of spins observed.

Keywords:

Cobalt ferrite Cobalt Materials science Ferrite (magnet) Nano- Metallurgy Composite material

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Magnetic Properties and Synthesis of Ferrites

Physical Sciences → Materials Science → Materials Chemistry

Studies of Magnetic Structure of Cobalt-ferrite Nano-particles

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