Excess spin and the dynamics of antiferromagnetic ferritin

Authors
Harris, JGE Grimaldi, JE Awschalom, DD Chiolero, A Loss, D
Citation
Jge. Harris et al., Excess spin and the dynamics of antiferromagnetic ferritin, PHYS REV B, 60(5), 1999, pp. 3453-3456
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
5
Year of publication
1999
Pages
3453 - 3456
Database
ISI
SICI code
0163-1829(19990801)60:5<3453:ESATDO>2.0.ZU;2-5
Abstract
Temperature-dependent magnetization measurements on a series of synthetic f erritin proteins containing from 100 to 3000 Fe(III) ions are used to deter mine the uncompensated moment of these antiferromagnetic particles. The res ults are compared with recent theories of macroscopic quantum coherence whi ch explicitly include the effect of this excess moment. The scaling of the excess moment with protein size is consistent with a simple model of finite -size effects and sublattice noncompensation. [S0163-1829(99)03429-3].