| Synthesis and magnetic properties of CoFe{sub 2}O{sub 4} spinel ferrite nanoparticles doped with lanthanide ions |
| Creator/Author |
Kahn, Myrtil L. ; Zhang, Z. John |
| Publication Date |
2001 Jun 04 |
| OSTI Identifier |
OSTI ID: 40203182 |
| Other Number(s) |
Journal ID: ISSN 0003-6951; TRN: IM200106%%28 |
| Resource Type |
Journal Article |
| Resource Relation |
Journal Name: Applied Physics Letters; Journal Volume: 78; Journal Issue: 23; Other Information: DOI: 10.1063/1.1377621; Othernumber: APPLAB000078000023003651000001; 021123APL; PBD: 4 Jun 2001 |
| Sponsoring Org |
(US) |
| Subject |
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COBALT; FERRITE; FERRITES; MAGNETIC PROPERTIES; MODULATION; PHYSICS; RARE EARTHS; SPINELS; SYNTHESIS |
| Description/Abstract |
Lanthanide ions have been doped into cobalt spinel ferrites using an oil-in-water micellar method to form CoLn{sub 0.12}Fe{sub 1.88}O{sub 4} nanoparticles with Ln=Ce, Sm, Eu, Gd, Dy, or Er. Doping with lanthanide ions (Ln{sup III}) modulates the magnetic properties of cobalt spinel ferrite nanoparticles. In particular cases of Gd{sup 3+} or Dy{sup 3+} ions, a dramatic increase in the blocking temperature and coercivity is observed. Indeed, the introduction of only 4% of Gd{sup 3+} ions increases the blocking temperature {similar_to}100 K and the coercivity 60%. Initial studies on the magnetic properties of these doped nanoparticles clearly demonstrate that the relationship between the modulation of magnetic properties and the nature of doped Ln{sup III} ions is interesting but very complex. {copyright} 2001 American Institute of Physics. |
