Effect of Me2+/OH- ratio in the formation of Mn0.5Zn0.5Fe2O4 nanoparticles of different sizes and shapes in association with thermomagnetic property

• Published in: Pramāṇa Vol. 94; no. 1
• Main Authors: Parekh, Kinnari, Parmar, Harshida, Sharma, Vinay
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 2020; Springer Nature B.V
• Subjects: Astronomy; Astrophysics and Astroparticles; Composition; Curie temperature; Ferrites; Induction heating; Low temperature; Magnetic induction; Magnetic properties; Magnetization; Nanoparticles; Nucleation; Observations and Techniques; Physics; Physics and Astronomy; Stoichiometry; 68.37.Lp; magnetic properties; 81.07.Bc; Manganese zinc ferrites; 75.50.Tt; magnetic fluid hyperthermia; 81.16.Be; 61.14.Qp; mechanical properties; 75.30.Cr; 75.75.+a
• ISSN: 0304-4289; 0973-7111
• DOI: 10.1007/s12043-020-01945-6

The influence of metal ion to hydroxide ion (
Me
2
+
/
OH
-
)
ratio on the synthesis of
Mn
0.5
Zn
0.5
Fe
2
O
4
(MZ5) ferrite nanoparticles is reported. The aim of this low-temperature co-precipitation technique is to produce MZ5 nanoparticles with different sizes in single domain range. The variation in
Me
2
+
/
OH
-
ratio affects the growth and shape of the particles. The mechanism of nucleation and growth of the particles is discussed. EDX and XPS measurements show the change in stoichiometry of the composition when
Me
2
+
/
OH
-
ratio changes. When the ratio is 0.52, Zn ion was found to be absent and the structure resembles
Mn
x
Fe
3
-
x
O
4
.
The defect in the composition changes magnetic properties such as saturation magnetisation and Curie temperature of the samples. 119 nm crystalline size with highest magnetisation (
80
Am
2
/
kg
) is obtained which shows quite good response to induction heating (specific absorption rate (SAR)
=
78 W/g). Moreover, SAR and intrinsic loss power (ILP) are higher for MZ5 ferrite than that are reported earlier. This shows the potential of magnetic induction heating in the treatment of cancer.