Magnetic properties of iron nanoparticles grown in a glass matrix

S. Roy; B. Roy; D. Chakravorty

doi:10.1063/1.361008

Magnetic properties of iron nanoparticles grown in a glass matrix

S. Roy
, B. Roy
, D. Chakravorty

Indian Association for the Cultivation of Science

Research output: Contribution to journal › Article › peer-review

Abstract

Iron particles of diameters in the range 5.5-8.5 nm have been synthesized within a suitably chosen oxide glass by subjecting the latter to a 3Na⁺⇌Fe³⁺ exchange reaction followed by reduction treatment in hydrogen. Magnetic measurements have been carried out over the temperature range 20-300 K. The coercive force increases as the iron particle size is decreased. The maximum value of coercive force corresponding to 0 K (H_c0)∼548 Oe is obtained for a specimen having diameter of 6.5 nm. The magnetocrystalline anisotropy constant in the case of nanosized iron particles is estimated to be one order of magnitude higher than that of bulk iron.

Original language	English
Pages (from-to)	1642-1645
Number of pages	4
Journal	Journal of Applied Physics
Volume	79
Issue number	3
DOIs	https://doi.org/10.1063/1.361008
Publication status	Published - 1 Feb 1996
Externally published	Yes

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abstract = "Iron particles of diameters in the range 5.5-8.5 nm have been synthesized within a suitably chosen oxide glass by subjecting the latter to a 3Na+⇌Fe3+ exchange reaction followed by reduction treatment in hydrogen. Magnetic measurements have been carried out over the temperature range 20-300 K. The coercive force increases as the iron particle size is decreased. The maximum value of coercive force corresponding to 0 K (Hc0)∼548 Oe is obtained for a specimen having diameter of 6.5 nm. The magnetocrystalline anisotropy constant in the case of nanosized iron particles is estimated to be one order of magnitude higher than that of bulk iron.",

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AU - Chakravorty, D.

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N2 - Iron particles of diameters in the range 5.5-8.5 nm have been synthesized within a suitably chosen oxide glass by subjecting the latter to a 3Na+⇌Fe3+ exchange reaction followed by reduction treatment in hydrogen. Magnetic measurements have been carried out over the temperature range 20-300 K. The coercive force increases as the iron particle size is decreased. The maximum value of coercive force corresponding to 0 K (Hc0)∼548 Oe is obtained for a specimen having diameter of 6.5 nm. The magnetocrystalline anisotropy constant in the case of nanosized iron particles is estimated to be one order of magnitude higher than that of bulk iron.

AB - Iron particles of diameters in the range 5.5-8.5 nm have been synthesized within a suitably chosen oxide glass by subjecting the latter to a 3Na+⇌Fe3+ exchange reaction followed by reduction treatment in hydrogen. Magnetic measurements have been carried out over the temperature range 20-300 K. The coercive force increases as the iron particle size is decreased. The maximum value of coercive force corresponding to 0 K (Hc0)∼548 Oe is obtained for a specimen having diameter of 6.5 nm. The magnetocrystalline anisotropy constant in the case of nanosized iron particles is estimated to be one order of magnitude higher than that of bulk iron.

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Magnetic properties of iron nanoparticles grown in a glass matrix

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