Journal article

Publication year: 2008

Journal: Physical Review B

Volume number: 78

Issue number: 13

ISSN: 1098-0121

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevB.78.132408

Publisher: American Physical Society

Abstract: 
We have studied the paramagnetic-to-antiferromagnetic phase transition in spherical beta-MnS nanoparticles of well defined diameters in the range of 3-11 nm. The MnS nanoparticles were obtained by intrapore synthesis inside mesoporous silica matrices. Electron spin resonance and magnetization measurements reveal that no antiferromagnetic order is established in MnS spheres of 3 nm down to 2 K and that the antiferromagnetic order is gradually recovered on increasing the particle diameter to 11 nm. Photoluminescence excitation spectroscopy proves that in all MnS nanostructures the nearest-neighbor coupling between the Mn ions remains the same as in bulk suggesting that the suppression of the phase transition arises due to geometric restrictions alone.

Harvard Citation style: Kurz, T., Chen, L., Brieler, F., Klar, P., von Nidda, H., Froeba, M., et al. (2008) Minimal number of atoms to constitute a magnet: Suppression of magnetic order in spherical MnS nanoparticles, Physical Review B, 78(13), Article 132408. https://doi.org/10.1103/PhysRevB.78.132408

APA Citation style: Kurz, T., Chen, L., Brieler, F., Klar, P., von Nidda, H., Froeba, M., Heimbrodt, W., & Loidl, A. (2008). Minimal number of atoms to constitute a magnet: Suppression of magnetic order in spherical MnS nanoparticles. Physical Review B. 78(13), Article 132408. https://doi.org/10.1103/PhysRevB.78.132408