On the estimation of physical parameters of magnetic nanoparticles in magnetic fluid

2010 ◽  
Vol 46 (1) ◽  
pp. 31-40 ◽  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Fluid ◽  
Physical Parameters

scholarly journals Magnetoviscosity of a Magnetic Fluid Based on Barium Hexaferrite Nanoplates

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1870
Author(s):  
Dmitry Borin ◽  
Robert Müller ◽  
Stefan Odenbach
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Magnetic Nanoparticles ◽  
External Magnetic Field ◽  
Shear Flow ◽  
Magnetic Fluid ◽  
Barium Hexaferrite ◽  
Dipole Interaction ◽  
Field Dependent ◽  
Fluid Behaviour

This paper presents the results of an experimental study of the influence of an external magnetic field on the shear flow behaviour of a magnetic fluid based on barium hexaferrite nanoplates. With the use of rheometry, the magnetoviscosity and field-dependent yield-stress in the fluid are evaluated. The observed fluid behaviour is compared to that of ferrofluids with magnetic nanoparticles having high dipole interaction. The results obtained supplement the so-far poorly studied topic of the influence of magnetic nanoparticles’ shape on magnetoviscous effects. It is concluded that the parameter determining the observed magnetoviscous effects in the fluid under study is the ratio V2/l3, where V is the volume of the nanoparticle and l is the size of the nanoparticle in the direction corresponding to its orientation in the externally applied magnetic field.

scholarly journals Evaluation of magnetic nanoparticles for magnetic fluid hyperthermia

2019 ◽  
Vol 36 (1) ◽  
pp. 686-700 ◽  
Author(s):  
Olivia L. Lanier ◽  
Olena I. Korotych ◽  
Adam G. Monsalve ◽  
Dayita Wable ◽  
Shehaab Savliwala ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Fluid ◽  
Magnetic Fluid Hyperthermia

Study on γ-Fe2O3 Magnetic Fluid by Thermal Oxidizing of Fe3O4 Nanoparticles

2015 ◽  
Vol 713-715 ◽  
pp. 2916-2919
Author(s):  
Hang Zheng ◽  
Hui Ping Shao ◽  
Zi Fen Zhao
Keyword(s):  
Surface Modification ◽  
Oleic Acid ◽  
Magnetic Nanoparticles ◽  
Saturation Magnetization ◽  
Sodium Oleate ◽  
Magnetic Fluid ◽  
Silicone Oil ◽  
Precipitation Method ◽  
Carrier Liquid ◽  
Co Precipitation

In this paper, Fe3O4magnetic nanoparticles were synthesized by chemical co-precipitation method and their surface was modified by sodium oleate. The γ-Fe2O3magnetic nanoparticles were achieved by thermal oxidizing of Fe3O4. The γ-Fe2O3magnetic fluid was prepared by using silicone oil as carrier liquid and oleic acid as surface modification agent, and the saturation magnetization of prepared γ-Fe2O3magnetic fluid hits 14.25emu/g.

scholarly journals Preparation and Complex Characterization of Magnetic Nanoparticles in Magnetic Fluid

2014 ◽  
Vol 126 (1) ◽  
pp. 268-269 ◽  
Author(s):  
M. Kubovčíková ◽  
I. Antal ◽  
J. Kováč ◽  
V. Závišová ◽  
M. Koneracká ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Fluid ◽  
Complex Characterization

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.

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