“ Magnetic properties of Co nanoparticles in a Cr2O3 antiferromagnetic matrix ”

E. WINKLER, R.D. ZYSLER, H.E. TROIANI AND D. FIORANI

PHYSICA B - CONDENSED MATTER

ELSEVIER SCIENCE BV

Año: 2006 p. 268 - 270

0921-4526

We present the synthesis and study of the magnetic properties of
6 nm Co nanoparticles embedded in an antiferromagnetic matrix of Cr2O3. The magnetic measurements have shown the presence of exchange interactions at the ferromagnetic/antiferromagnetic interface. This interaction is manifested by the shift of the coercive field measured after field cooling the sample through the Cr2O3 Ne´ el temperature (TN ¼ 308 K). Moreover, this interaction enhances the anisotropy of the Co nanoparticles making them magnetically stable till to room temperature.
6 nm Co nanoparticles embedded in an antiferromagnetic matrix of Cr2O3. The magnetic measurements have shown the presence of exchange interactions at the ferromagnetic/antiferromagnetic interface. This interaction is manifested by the shift of the coercive field measured after field cooling the sample through the Cr2O3 Ne´ el temperature (TN ¼ 308 K). Moreover, this interaction enhances the anisotropy of the Co nanoparticles making them magnetically stable till to room temperature.2O3. The magnetic measurements have shown the presence of exchange interactions at the ferromagnetic/antiferromagnetic interface. This interaction is manifested by the shift of the coercive field measured after field cooling the sample through the Cr2O3 Ne´ el temperature (TN ¼ 308 K). Moreover, this interaction enhances the anisotropy of the Co nanoparticles making them magnetically stable till to room temperature.2O3 Ne´ el temperature (TN ¼ 308 K). Moreover, this interaction enhances the anisotropy of the Co nanoparticles making them magnetically stable till to room temperature.TN ¼ 308 K). Moreover, this interaction enhances the anisotropy of the Co nanoparticles making them magnetically stable till to room temperature.