Single-particle versus collective effects in assemblies of nanomagnets: Screening
Source abstract
Abstract
We discuss experimentally realizable situations in which surface effects may "screen out" the dipolar interactions in an assembly of nanomagnets, which then behaves as a noninteracting system. We consider three examples of physical observables, equilibrium magnetization, ac susceptibility and ferromagnetic resonance spectrum, to illustrate this screening effect. For this purpose, we summarize the formalism that accounts for both the intrinsic features of the nanomagnets and their collective effects within an assembly the condition for screening.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Theoretical and Computational Physics · Characterization and Applications of Magnetic Nanoparticles
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (50)
Show source-provided references
1. Magnetic relaxation in fine particle systems
2. Toro · J. Phys: Conf. Ser. · 2014 · 521
3. Fiorani · J. Phys: Conf. Ser. · 2014 · 521
4. Vasilakaki · Phys. Rev. B · 2018 · 9710.1103/PhysRevB.97.094413 ↗
5. Bender · Appl. Phys. Lett. · 2019 · 11510.1063/1.5121234 ↗
6. Strijkers · J. Appl. Phys. · 1999 · 86 · 514110.1063/1.371490 ↗
7. Encinas-Oropesa · J. Appl. Phys. · 2001 · 89 · 670410.1063/1.1362638 ↗
8. Tronc · J. Magn. Magn. Mater. · 2003 · 262 · 610.1016/S0304-8853(03)00011-8 ↗
9. Surface-related properties of γ-Fe2O3 nanoparticles10.1016/S0304-8853(00)00369-3 ↗
10. Mehdaoui · J. Magn. Magn. Mater. · 2010 · 322 · L4910.1016/j.jmmm.2010.05.012 ↗
11. Winkler · J. Mater. Chem. · 2012 · 22 · 1662710.1039/c2jm33224h ↗
12. Maurer · Appl. Phys. Lett. · 2007 · 9110.1063/1.2800786 ↗
13. Sun · Science · 2000 · 287 · 198910.1126/science.287.5460.1989 ↗
14. Yang · Appl. Phys. Lett. · 2009 · 94
15. Bender · Phys. Rev. B · 2018 · 9810.1103/PhysRevB.98.224420 ↗
16. Sánchez et al., Simultaneous individual and dipolar collective properties in binary assemblies of magnetic nanoparticles, 2019, arXiv:1909.13500v1 5.
17. Effects of surface anisotropy on hysteresis in fine magnetic particles10.1103/PhysRevB.50.3077 ↗
18. Atomic-scale magnetic modeling of oxide nanoparticles10.1103/PhysRevB.59.6321 ↗
19. Kachkachi · Phys. A Stat. Mech. Appl. · 2001 · 300 · 48710.1016/S0378-4371(01)00361-2 ↗
20. Kachkachi · Eur. Phys. J. B · 2001 · 22 · 29110.1007/s100510170106 ↗
21. Finite-size and surface effects in maghemite nanoparticles: Monte Carlo simulations10.1103/PhysRevB.63.184416 ↗
22. Hysteretic properties of a magnetic particle with strong surface anisotropy10.1103/PhysRevB.66.174419 ↗
23. Kachkachi · 2005 · 75
24. Towards multiscale modeling of magnetic materials: simulations of FePt10.1103/PhysRevB.77.184428 ↗
25. Garanin · Phys. Rev. Lett. · 2003 · 90 · 06550410.1103/PhysRevLett.90.065504 ↗
26. Effects of spin non-collinearities in magnetic nanoparticles10.1016/j.jmmm.2007.03.212 ↗
27. Garanin · Phys. Rev. B · 2018 · 98
28. Effective anisotropies and energy barriers of magnetic nanoparticles within the Néel’s surface anisotropy10.1103/PhysRevB.76.064416 ↗
29. Surface-induced cubic anisotropy in nanomagnets10.1103/PhysRevB.73.224402 ↗
30. Extensions of the geometric solution of the two dimensional coherent magnetization rotation model10.1016/S0304-8853(97)01014-7 ↗
31. Thermal and surface anisotropy effects on the magnetization reversal of a nanocluster10.1088/0022-3727/41/13/134004 ↗
32. Classical and quantum magnetization reversal studied in nanometer-sized particles and clusters
33. Jamet · Phys. Rev. Lett. · 2001 · 86 · 467610.1103/PhysRevLett.86.4676 ↗
34. Effect of surface anisotropy on the hysteretic properties of a magnetic particle10.1063/1.1450846 ↗
35. Vargas · Phys. Rev. B · 2000 · 62 · 633710.1103/PhysRevB.62.6337 ↗
36. Franco · J. Appl. Phys. · 2014 · 11610.1063/1.4904750 ↗
37. Beleggia · J. Magn. Magn. Mater. · 2004 · 278 · 27010.1016/j.jmmm.2003.12.1314 ↗
38. Ezzir · 1998
39. Enhanced magnetization of nanoscale colloidal cobalt particles10.1103/PhysRevB.51.11527 ↗
40. Surface effects in nanoparticles: Monte Carlo simulations10.1007/s100510051079 ↗
41. Surface effects on the magnetic behavior of nanoparticle assemblies10.1103/PhysRevB.85.024419 ↗
42. Interplay between surface anisotropy and dipolar interactions in an assembly of nanomagnets10.1103/PhysRevB.88.104424 ↗
43. Magnetization of nanomagnet assemblies: effects of anisotropy and dipolar interactions10.1140/epjb/e2005-00129-0 ↗
44. On the statics and dynamics of magnetoanisotropic nanoparticles
45. Jonsson · Phys. Rev. B · 2001 · 64
46. ac susceptibility of an assembly of nanomagnets: combined effects of surface anisotropy and dipolar interactions10.1103/PhysRevB.90.094416 ↗
47. Masunaga · Phys. Rev. B · 2009 · 8010.1103/PhysRevB.80.184428 ↗
48. Déjardin · Phys. Rev. B · 2018 · 9710.1103/PhysRevB.97.224407 ↗
49. Mitsuzuka · Appl. Phys. Lett. · 2012 · 10010.1063/1.4711219 ↗
50. Pigeau · Phys. Rev. Lett. · 2012 · 10910.1103/PhysRevLett.109.247602 ↗