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Zhang, Hongwei; Sun, Zhigang; Zhang, Shaoying; Bao-Shan, Han; Shen, Baogen; Tung, I-Chung; Chin, Tsung‐Shune

doi:10.1103/physrevb.60.64

Cited by 52 publications

(24 citation statements)

References 20 publications

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“…For an assembly of isotropic small noninteracting particles with uniaxial anisotropy [1], reduced remanence m r (¼ J r =J s ) is 1 2 : As the surface-tovolume ratio is increased in nanocrystalline PM [7,[9][10][11][12], m r is found to be larger than 1 2 : The remanence enhancement is due to intergrain exchange coupling (IGEC). Furthermore, a single-magnetic-hard-phase behavior can be found in nanocomposite PM consisting of magnetic hard and soft phases, in which the magnetization vector of soft phase is aligned with that of the hard phase by IGEC [7,[13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 94%

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Zhang

Rong

et al. 2004

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 94%

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Zhang

Rong

et al. 2004

Journal of Magnetism and Magnetic Materials

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“…It is well known that in the case of high-remanent magnets, the effect of the exchange coupling between the magnetic grains leads to a significant enhancement of the remanence and energy product as compared to the decoupled magnet. [17][18][19][20][21][22] Clemente et al proposed a model for this enhancement which requires the magnetic grains to be in intimate contact in order to maximize the ferromagnetic exchange interaction between adjacent grains. 23 In this paper we report experimental and theoretical results for a single 3 nm thick Fe layer grown on vicinal Si(111).…”

Section: Introductionmentioning

confidence: 99%

Intralayer coupling in self-organized Fe nanoclusters grown on vicinal Si(111)

et al. 2004

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This paper reports on the magnetic properties of Fe thin film grown on vicinal Si(111). The surface analysis, performed via scanning tunneling microscopy, showed that the iron grows in a form of two distinct types of elongated nanosized grains, aligned parallel and perpendicular to the substrate steps, respectively. A phenomenological model was used to interpret the experimental magnetization data which considers the two types of Fe nanoclusters with both cubic and uniaxial anisotropies, where those of each type are all identical and aligned. Every particle of the first type is coupled to the adjacent particle of the other type only via direct exchange coupling through the corresponding surface atoms. The experimental hysteresis loops as well as the coercivity and remanent magnetization angular variations are very well reproduced by the model, demonstrating that the magnetic behavior of this system is mainly determined by the ferromagnetic intralayer exchange coupling.

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“…Goll, Seeger, and Kronmüller showed the relationship between real microstructure and the coercive field in nanocomposite magnets, [3] which was further developed by Zhang et al [4,5] All these show that the coercivity of the magnets is dependent on the exchange-coupling between softand hard-magnetic grains.…”

Section: Basic Principlementioning

confidence: 99%

Nanocomposite Magnets and their Preparation under High Pressure

Zhang¹

2001

Adv. Eng. Mater.

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This article reports current studies on nanocomposite magnets and a newly developed route for their preparation, known as crystallization of amorphous alloy under high pressure (CAAHP). The microstructure and magnetic properties of nanocomposite magnets prepared by CAAHP are presented, and the influences of pressure on the microstructures of the magnets are discussed. α‐Fe/Sm2(Fe,Si)17Cx nanocomposite magnets with a grain size <10 nm have been successfully prepared by CAAHP, and a maximum energy product of about 25 MGOe is obtained.

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Intergrain exchange coupling and coercivity mechanism of nanocrystallineSm2Fe15−x

Cited by 52 publications

References 20 publications

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Investigation on the coercivity and remanence of single-phase nanocrystalline permanent magnets by micromagnetic finite-element method

Intralayer coupling in self-organized Fe nanoclusters grown on vicinal Si(111)

Nanocomposite Magnets and their Preparation under High Pressure

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