scholarly journals Shape-dependent exchange bias effect in magnetic nanoparticles with core-shell morphology

2015 ◽  
Vol 92 (6) ◽  
Author(s):  
V. Dimitriadis ◽  
D. Kechrakos ◽  
O. Chubykalo-Fesenko ◽  
V. Tsiantos
Keyword(s):  
Magnetic Nanoparticles ◽  
Exchange Bias ◽  
Shell Morphology ◽  
Core Shell ◽  
Bias Effect ◽  
Exchange Bias Effect

scholarly journals Well-controlled exchange bias effect in MnO@Mn3O4 core-shell nanoparticles with an inverted coupling structures

AIP Advances ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 045316 ◽  
Author(s):  
Ningning Song ◽  
Haitao Yang ◽  
Yi Luo ◽  
Xiao Ren ◽  
Jun Zhou ◽  
...  
Keyword(s):  
Exchange Bias ◽  
Core Shell ◽  
Bias Effect ◽  
Shell Nanoparticles ◽  
Exchange Bias Effect ◽  
Core Shell Nanoparticles

scholarly journals A comparative investigation of normal and inverted exchange bias effect for magnetic fluid hyperthermia applications

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
S. P. Tsopoe ◽  
C. Borgohain ◽  
Rushikesh Fopase ◽  
Lalit M. Pandey ◽  
J. P. Borah
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Fluid ◽  
Exchange Bias ◽  
Comparative Investigation ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Magnetic Fluid Hyperthermia ◽  
Heating Efficiency ◽  
Compatibility Analysis ◽  
Novel Approach

Abstract Exchange bias (EB) of magnetic nanoparticles (MNPs) in the nanoscale regime has been extensively studied by researchers, which have opened up a novel approach in tuning the magnetic anisotropy properties of magnetic nanoparticles (MNPs) in prospective application of biomedical research such as magnetic hyperthermia. In this work, we report a comparative study on the effect of magnetic EB of normal and inverted core@shell (CS) nanostructures and its influence on the heating efficiency by synthesizing Antiferromagnetic (AFM) NiO (N) and Ferrimagnetic (FiM) Fe3O4 (F). The formation of CS structures for both systems is clearly authenticated by XRD and HRTEM analyses. The magnetic properties were extensively studied by Vibrating Sample Magnetometer (VSM). We reported that the inverted CS NiO@Fe3O4 (NF) MNPs have shown a greater EB owing to higher uncompensated spins at the interface of the AFM, in comparison to the normal CS Fe3O4@NiO (FN) MNPs. Both the CS systems have shown higher SAR values in comparison to the single-phased F owing to the EB coupling at the interface. However, the higher surface anisotropy of F shell with more EB field for NF enhanced the SAR value as compared to FN system. The EB coupling is hindered at higher concentrations of NF MNPs because of the enhanced dipolar interactions (agglomeration of nanoparticles). Both the CS systems reach to the hyperthermia temperature within 10 min. The cyto-compatibility analysis resulted in the excellent cell viability (> 75%) for 3 days in the presence of the synthesized NPs upto 1 mg/ml. These observations endorsed the suitability of CS nanoassemblies for magnetic fluid hyperthermia applications.

The effects of exchange bias on Fe–Co/MgO magnetic nanoparticles with core/shell morphology

2009 ◽  
Vol 22 (2) ◽  
pp. 026004 ◽  
Author(s):  
C Martinez-Boubeta ◽  
Ll Balcells ◽  
C Monty ◽  
B Martínez
Keyword(s):  
Magnetic Nanoparticles ◽  
Exchange Bias ◽  
Shell Morphology ◽  
Core Shell
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