Fabrication and abnormal magnetic properties of MnO nanoparticles via vapor phase growth

Y. Q. Chang; D. P. Yu; Z. Wang; Y. Long; H. Z. Zhang; R. C. Ye

doi:10.1016/j.jcrysgro.2005.05.033

Fabrication and abnormal magnetic properties of MnO nanoparticles via vapor phase growth

Y. Q. Chang^*, D. P. Yu, Z. Wang, Y. Long, H. Z. Zhang, R. C. Ye

^*Corresponding author for this work

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

15 Citations (Scopus)

Abstract

Nano-sized MnO particles were synthesized via vapor phase deposition on silicon substrates. The products were characterized by X-ray diffraction and transmission electron microscopy. The results reveal that the MnO nanoparticles are sphere like and well crystallized with diameters less than 40 nm. Magnetization measurements show that the MnO nanoparticles exhibit obvious ferromagnetic behavior with a ferromagnetic to paramagnetic phase transition at 42 K. A large coercivity of up to 4035 Oe and a remanence of 0.646 (emu g ^-1) have been observed at 5 K. The ferromagnetic behavior of these MnO nanoparticles can be explained in terms of the presence of non-compensated surface spins on the antiferromagnetic core due to the high surface-to-volume ratio.

Original language	English
Pages (from-to)	678-682
Number of pages	5
Journal	Journal of Crystal Growth
Volume	281
Issue number	2-4
DOIs	https://doi.org/10.1016/j.jcrysgro.2005.05.033
Publication status	Published - 1 Aug 2005

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10.1016/j.jcrysgro.2005.05.033

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title = "Fabrication and abnormal magnetic properties of MnO nanoparticles via vapor phase growth",

abstract = "Nano-sized MnO particles were synthesized via vapor phase deposition on silicon substrates. The products were characterized by X-ray diffraction and transmission electron microscopy. The results reveal that the MnO nanoparticles are sphere like and well crystallized with diameters less than 40 nm. Magnetization measurements show that the MnO nanoparticles exhibit obvious ferromagnetic behavior with a ferromagnetic to paramagnetic phase transition at 42 K. A large coercivity of up to 4035 Oe and a remanence of 0.646 (emu g -1) have been observed at 5 K. The ferromagnetic behavior of these MnO nanoparticles can be explained in terms of the presence of non-compensated surface spins on the antiferromagnetic core due to the high surface-to-volume ratio.",

keywords = "A1. Nanostructures, A3. Chemical vapor deposition process, B1. MnO, B2. Magnetic materials",

author = "Chang, {Y. Q.} and Yu, {D. P.} and Z. Wang and Y. Long and Zhang, {H. Z.} and Ye, {R. C.}",

year = "2005",

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doi = "10.1016/j.jcrysgro.2005.05.033",

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T1 - Fabrication and abnormal magnetic properties of MnO nanoparticles via vapor phase growth

AU - Chang, Y. Q.

AU - Yu, D. P.

AU - Wang, Z.

AU - Long, Y.

AU - Zhang, H. Z.

AU - Ye, R. C.

PY - 2005/8/1

Y1 - 2005/8/1

N2 - Nano-sized MnO particles were synthesized via vapor phase deposition on silicon substrates. The products were characterized by X-ray diffraction and transmission electron microscopy. The results reveal that the MnO nanoparticles are sphere like and well crystallized with diameters less than 40 nm. Magnetization measurements show that the MnO nanoparticles exhibit obvious ferromagnetic behavior with a ferromagnetic to paramagnetic phase transition at 42 K. A large coercivity of up to 4035 Oe and a remanence of 0.646 (emu g -1) have been observed at 5 K. The ferromagnetic behavior of these MnO nanoparticles can be explained in terms of the presence of non-compensated surface spins on the antiferromagnetic core due to the high surface-to-volume ratio.

AB - Nano-sized MnO particles were synthesized via vapor phase deposition on silicon substrates. The products were characterized by X-ray diffraction and transmission electron microscopy. The results reveal that the MnO nanoparticles are sphere like and well crystallized with diameters less than 40 nm. Magnetization measurements show that the MnO nanoparticles exhibit obvious ferromagnetic behavior with a ferromagnetic to paramagnetic phase transition at 42 K. A large coercivity of up to 4035 Oe and a remanence of 0.646 (emu g -1) have been observed at 5 K. The ferromagnetic behavior of these MnO nanoparticles can be explained in terms of the presence of non-compensated surface spins on the antiferromagnetic core due to the high surface-to-volume ratio.

KW - A1. Nanostructures

KW - A3. Chemical vapor deposition process

KW - B1. MnO

KW - B2. Magnetic materials

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DO - 10.1016/j.jcrysgro.2005.05.033

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VL - 281

SP - 678

EP - 682

JO - Journal of Crystal Growth

JF - Journal of Crystal Growth

IS - 2-4

ER -

Fabrication and abnormal magnetic properties of MnO nanoparticles via vapor phase growth

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