Temperature evolution of the magnetic properties of Ag/Fe nanodot arrays
Source abstract
Abstract
Abstract Magnetic nanodot structures have significant potential in spintronic applications. The magnetism of nanodots are predominately influenced by external conditions such as temperature. While the magnetization reversal modes of sub-100 nm Fe nanodots has been reported, currently there is a lack of information about the temperature evolution of the magnetic properties of larger Fe nanodots. In this work, the magnetism of Fe/Ag thin films and nanodot arrays were comparatively analyzed over the temperature range of 2–300 K. A natively-oxidized α-Fe2O3 layer was formed at the Fe/SiO2 interface, and this oxide resulted in an exchange bias at low temperatures. The in-plane and out-of-plane magnetization reversal modes of nanodot arrays were revealed through the magnetic hysteresis loops’ temperature dependence. The contribution of exchange coupling between Fe and α-Fe2O3 was also identified through the temperature dependence of the coercivity, exchange bias, and DC susceptibility. Our results provide new insights towards understanding the magnetization dynamics in nanosized magnetic elements.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Magnetic properties of thin films · Characterization and Applications of Magnetic Nanoparticles · Magnetic Properties and Synthesis of Ferrites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (41)
Show source-provided references
1. Patterned magnetic recording media10.1146/annurev.matsci.31.1.203 ↗
2. Comparative evaluation of spin-transfer-torque and magnetoelectric random access memory10.1109/JETCAS.2016.2547681 ↗
3. Magnetic nanostructures for advanced technologies: fabrication, metrology and challenges10.1088/0022-3727/44/30/303001 ↗
4. Magnetic properties of patterned arrays of exchange-biased IrMn/Co square dots10.1088/0022-3727/46/34/345308 ↗
5. Magnetic nanodots for device applications10.1016/S0304-8853(01)01086-1 ↗
6. Enhanced asymmetric magnetization reversal in nanoscale Co/CoO arrays: competition between exchange bias and magnetostatic coupling10.1103/PhysRevLett.91.187202 ↗
7. Fabrication and thermal stability of arrays of Fe nanodots10.1063/1.1526458 ↗
8. Tailoring the magnetic properties of Fe asymmetric nanodots10.1016/j.jmmm.2011.01.019 ↗
9. H. Raanaei, S. Abbasi, How to Observe Dipolar Interaction of Coupled Nanodot Patterned Structure in the Inverse Space, in: Proc. 5th Intl. Congr. Nanosci. Nanotechnol., 2014.
10. Tuning magnetostatic interaction in single-crystalline nanodot arrays with in-plane easy axes10.1063/1.3323094 ↗
11. Vortex and double-vortex nucleation during magnetization reversal in Fe nanodots of different dimensions10.1016/j.jmmm.2018.12.031 ↗
12. Magnetic vortex core observation in circular dots of permalloy10.1126/science.289.5481.930 ↗
13. MFM study of magnetic vortex cores in circular permalloy dots: behavior in external field10.1016/S0304-8853(01)00708-9 ↗
14. Enhancement of thermal stability using ferromagnetically coupled synthetic free layers in MgO-based magnetic tunnel junctions10.1109/TMAG.2010.2045741 ↗
15. Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots10.1063/1.2807276 ↗
16. X-ray photoelectron spectroscopy and magnetic properties in Fe–SiO2 granular films10.1063/1.1605818 ↗
17. Thermal effect on the coercivity of ultrathin NiFe films10.1109/20.619518 ↗
18. New magnetic anisotropy10.1103/PhysRev.105.904 ↗
19. Exchange bias10.1016/S0304-8853(98)00266-2 ↗
20. Magnetic domains in α−Fe2O310.1063/1.1723049 ↗
21. Source of anomalies in the temperature dependence of ferromagnetic resonance and susceptibility data in the FeAg heterosystem10.1063/1.1688671 ↗
22. Temperature dependence of ferromagnetic resonance as induced by NiO pinning layers10.1063/1.367662 ↗
23. Exchange bias relaxation in CoO-biased films10.1063/1.373424 ↗
24. Finite size effects in the static and dynamic magnetic properties of FeNi wire array structures10.1063/1.364567 ↗
25. Development of vortex state in circular magnetic nanodots: theory and experiment10.1103/PhysRevB.81.184417 ↗
26. Asymmetry of domain nucleation and enhanced coercivity in exchange-biased epitaxial NiO/NiFe bilayers10.1103/PhysRevB.57.R8111 ↗
27. Magnetic study of M-type doped barium ferrite nanocrystalline powders10.1063/1.354558 ↗
28. Temperature dependent coercivity and magnetization of nickel ferrite nanoparticles10.1016/j.jmmm.2010.02.010 ↗
29. Exchange bias effect in alloys and compounds
30. Size dependence of exchange bias in Co/CoO nanostructures10.1103/PhysRevLett.108.077205 ↗
31. Mechanisms of exchange anisotropy (invited)10.1063/1.340591 ↗
32. Mechanism of blocking temperature difference for parallel and perpendicular exchange biases in FePt/FeMn multilayers10.1109/TMAG.2006.888498 ↗
33. Thermal fluctuation aftereffect model for some systems with ferromagnetic-antiferromagnetic coupling10.1063/1.1660894 ↗
34. Domain state model for exchange bias. I. Theory10.1103/PhysRevB.66.014430 ↗
35. Hall · 1991
36. Finite-size effects in nickel nanowire arrays10.1103/PhysRevB.61.R6463 ↗
37. Morrish · 1994
38. Magnetic coupling parameters at an oxide-oxide interface from first principles: Fe2O3-FeTiO310.1103/PhysRevB.81.214432 ↗
39. Modulated exchange bias in NiFe/CoO/α-Fe2O3 trilayers and NiFe/CoO bilayers10.1016/j.physleta.2016.11.033 ↗
40. XCVII The demagnetizing factors for ellipsoids10.1080/14786444508521510 ↗
41. Perpendicular anisotropy in polycrystalline Ni-Fe thin films10.1063/1.1708436 ↗