Temperature-Induced Irreversible Structural Transition in Fe 1.1 Mn 1.9 O 4 Nanoparticles Synthesized by Combustion Method.
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| Title: | Temperature-Induced Irreversible Structural Transition in Fe 1.1 Mn 1.9 O 4 Nanoparticles Synthesized by Combustion Method. |
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| Authors: | Spivakov, Aleksandr A.1 (AUTHOR), Lin, Chun-Rong1 (AUTHOR) crlinspin@gmail.com, Chen, Ying-Zhen1 (AUTHOR), Huang, Li-Huai1 (AUTHOR) |
| Source: | Nanomaterials (2079-4991). Apr2023, Vol. 13 Issue 7, p1273. 11p. |
| Subjects: | Phase transitions, Magnetic measurements, Combustion, Magnetization measurement, Low temperatures, Ferrimagnetic materials |
| Abstract: | Fe1.1Mn1.9O4 nanoparticles were successfully synthesized using a combustion method. The influence of the heating temperature on the evolution of the structural and magnetic properties has been studied using various methods. The structural analysis results revealed that as-synthesized nanoparticles have a tetragonal structure with an average size of ~24 nm. The magnetic measurements of the sample showed its ferrimagnetic nature at room temperature with hysteresis at low fields. Temperature-dependent magnetization measurements allowed for the conclusion that the Curie temperature for Fe1.1Mn1.9O4 nanoparticles was ~465 °C. After high-temperature magnetic measurements, during which the samples were heated to various maximum heating temperatures (Tmax.heat.) in the range from 500 to 900 °C, it was found that the structure of the samples after cooling to room temperature depended on the heating temperature. Herewith, when the heating temperature was 600 < Tmax.heat. < 700 °C, an irreversible structural phase transition occurred, and the cooled samples retained a high-temperature cubic structure. The results of the magnetic analysis showed that the samples, following high-temperature magnetic measurements, demonstrated ferrimagnetic behavior. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Fe1.1Mn1.9O4 nanoparticles were successfully synthesized using a combustion method. The influence of the heating temperature on the evolution of the structural and magnetic properties has been studied using various methods. The structural analysis results revealed that as-synthesized nanoparticles have a tetragonal structure with an average size of ~24 nm. The magnetic measurements of the sample showed its ferrimagnetic nature at room temperature with hysteresis at low fields. Temperature-dependent magnetization measurements allowed for the conclusion that the Curie temperature for Fe1.1Mn1.9O4 nanoparticles was ~465 °C. After high-temperature magnetic measurements, during which the samples were heated to various maximum heating temperatures (Tmax.heat.) in the range from 500 to 900 °C, it was found that the structure of the samples after cooling to room temperature depended on the heating temperature. Herewith, when the heating temperature was 600 < Tmax.heat. < 700 °C, an irreversible structural phase transition occurred, and the cooled samples retained a high-temperature cubic structure. The results of the magnetic analysis showed that the samples, following high-temperature magnetic measurements, demonstrated ferrimagnetic behavior. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20794991 |
| DOI: | 10.3390/nano13071273 |
