The microstructure and magnetic properties of the Fe-Cu-Nb-Si-B finemets with different copper content

Tkachev, V. V.; Tsesarskaya, A. K.; Il'in, N.V.; Kraynova, G. S.; Fedorets, A. N.; Плотников, В. С.; Polyanski, D. A.

doi:10.1063/1.4998124

Cited by 2 publications

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“…Trying to optimize the high frequency characteristic of the softness and the dynamics of magnetization of it [5,6]. Researchers are working on nanocrystalline soft magnetic alloys [7][8][9][10][11][12] since last around five decades. It is found that many researchers have studied Co [13,14], Al [15,16] Cr-Mo [17] and Cr [18] substituted to Fe.…”

Section: Introductionmentioning

confidence: 99%

Effect of annealing on specific magnetization of Fe-Cr-Nb-Cu-Si-B with the partial replacement of Fe by chromium

et al. 2019

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The samples Fe 73.5-x Cr x Nb 3 Cu 1 Si 13.5 B 9 [x=7, 9, 10 and 12.5 are prepared in the amorphous state in the form of thin ribbons by rapid quenching technique at wheel speed of 25 m s −1 in an Ar atmosphere. The composition was sintered at the temperature 450-8000 C for half an hour. The saturation magnetization (Ms) and Curie temperature (Tc) of these alloys decrease linearly with the increase of Cr content for the entire composition range due to dilution of Fe magnetic moment and weakening of exchange interaction between of magnetic atoms. The critical composition for disappearance of ferromagnetism fall of curve Ms with the replacement Fe by Cr, where the nearest neighbor coupling is longer dominant and intermediate range occur, giving rise to a significant portion of antiferromagnetic interaction. The Curie temperature decreases due the weaker interaction among the Fe magnetic moment. The structural relaxation is associated with the magnetization up to the annealed temperature 600°C and the chemical disorderness arise with reference to enhancement of M of annealed samples. M versus H curves sharply rise which indicates the formation of crystallization and it seems to ferromagnetic and for x=12.5 which is paramagnetic in the amorphous condition with Tc=246 K. This increase of M for the four samples are due to the evolution of ferromagnetic α-Fe (Si) nanograin crystal.

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Section: Introductionmentioning

confidence: 99%

Effect of annealing on specific magnetization of Fe-Cr-Nb-Cu-Si-B with the partial replacement of Fe by chromium

et al. 2019

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“…In the last few decades many researchers have studied the different properties of nanomaterials [3,4] as well as the properties of partial substitution of many elements such as Mn [5] Co [6,7] and Cr [8] substituted ferrites. In…”

Section: Introductionmentioning

confidence: 99%

Microstructural Analysis of Amorphous and Nanocrystalline Fe73.5-xCrxNb3Cu1Si13.5B9 Alloy by XRD Analysis

Iqbal

Hossain

Gafur

et al. 2018

Journal of Asian Scientific Research

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This thesis is based on the experimental investigation of the effect of grain size of Fe73.5-xCrxNb3Cu1Si13.5B9 [x = 7, 9, 10 & 12.5] alloys in the amorphous and annealed states. The samples are initially prepared in the amorphous state in the form of thin ribbons by rapid quenching technique at wheel speed of 25m/s in an Ar atmosphere. The alloy has been annealed in a controlled way in the temperature range of 450-800 o C for 30 minutes. Amorphosity of the ribbon and nanocryatalline state was evaluated by XRD. In the optimized annealing condition the grain size has been obtained in the range of 11-30 nm. The primary crystallization phase shifts to higher annealed temperature with Cr content implying the enhancement of thermal stability of the amorphous alloys against crystallization due to increasing amount of Cr. The average grain size of the α-Fe (Si) phase, almost same under the identical annealing condition as the higher content Cr is increased. The peak shifts indicate the change of the values of Si-content of nanograins and therefore, the change of the values of lattice parameter of nanograins.

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The microstructure and magnetic properties of the Fe-Cu-Nb-Si-B finemets with different copper content

Cited by 2 publications

References 1 publication

Effect of annealing on specific magnetization of Fe-Cr-Nb-Cu-Si-B with the partial replacement of Fe by chromium

Effect of annealing on specific magnetization of Fe-Cr-Nb-Cu-Si-B with the partial replacement of Fe by chromium

Microstructural Analysis of Amorphous and Nanocrystalline Fe73.5-xCrxNb3Cu1Si13.5B9 Alloy by XRD Analysis

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