Structure, magnetic properties and Mössbauer spectroscopy of amorphous and nanocrystalline Fe73.5Cu1Nb3Si16.5B6

Zemčík, T.; Jirásková, Y.; Závěta, K.; Eckert, D.; Schneider, J.; Mattern, N.; Hesske, D.

doi:10.1016/0167-577x(91)90144-u

Cited by 41 publications

(5 citation statements)

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“…FINEMET materials have been investigated using various methods, including XRD, TEM, SEM, HRTEM, EXAFS, AFM, SANS, DSC, mechanical tests, and magnetic methods [11,14,20,[24][25][26][28][29][30][31][32][33][34], as well as by Mössbauer spectroscopy [35][36][37][38]. 57 Fe Mössbauer spectroscopy is a useful tool for the investigation of amorphous and nanostructured alloys because the 57 Fe hyperfine interactions are measured, i.e., the electrical monopole and quadrupole interactions as well as magnetic dipole interactions.…”

Section: Introductionmentioning

confidence: 99%

“…This method offers a unique possibility to get information about the microenvironment of the Mössbauer nucleus ( 57 Fe in this case) [39][40][41]. Mössbauer spectroscopy has already been applied successfully many times to study magnetic and structural properties as well as the crystallization processes in FINEMET alloys (see, e.g., [35][36][37][38][42][43][44][45][46][47][48][49]).…”

Section: Introductionmentioning

confidence: 99%

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Change in Magnetic Anisotropy at the Surface and in the Bulk of FINEMET Induced by Swift Heavy Ion Irradiation

et al. 2022

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57Fe transmission and conversion electron Mössbauer spectroscopy as well as XRD were used to study the effect of swift heavy ion irradiation on stress-annealed FINEMET samples with a composition of Fe73.5Si13.5Nb3B9Cu1. The XRD of the samples indicated changes neither in the crystal structure nor in the texture of irradiated ribbons as compared to those of non-irradiated ones. However, changes in the magnetic anisotropy both in the bulk as well as at the surface of the FINEMET alloy ribbons irradiated by 160 MeV 132Xe ions with a fluence of 1013 ion cm−2 were revealed via the decrease in relative areas of the second and fifth lines of the magnetic sextets in the corresponding Mössbauer spectra. The irradiation-induced change in the magnetic anisotropy in the bulk was found to be similar or somewhat higher than that at the surface. The results are discussed in terms of the defects produced by irradiation and corresponding changes in the orientation of spins depending on the direction of the stress generated around these defects.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Change in Magnetic Anisotropy at the Surface and in the Bulk of FINEMET Induced by Swift Heavy Ion Irradiation

et al. 2022

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“…The magnetic properties are thus expected to be extremely sensitive to (i) the size and crystallographic structure of nanocrystalline grains, (ii) the crystalline volume fraction, (iii) the nature of the interfaces between nanocrystalline grains and the amorphous matrix, and (iv) the composition of the residual amorphous matrix. This realization has motivated detailed investigations of the crystallographic structure and composition of the nanocrystalline phases in amorphous Fe 73.5 Cu 1 Nb 3 Si 22.5−x B x (5 x 12) alloys annealed for time durations t A 1 h at temperatures typically in the range 480 • C T A 600 • C. In this range of annealing temperatures, T A , and time durations, t A , there seems to be a broad consensus on the presence of residual amorphous phase and nanocrystalline Fe-Si grains of mean size [3,8,10] 10-20 nm that have the DO 3 structure [5][6][7][8][9][10][11][16][17][18][19][20][21] and a silicon content of 16-22 (at.%), based on the results of phase analysis of the most extensively studied nanocrystalline alloy with x = 9. However, there are reports of bcc Fe-Si nanocrystalline phase [2,4,14] or DO 3 nanocrystalline phase occasionally accompanied by [7] nanocrystalline grains of the tetragonal Fe 3 B structure.…”

Section: Introductionmentioning

confidence: 99%

“…This realization has motivated detailed investigations of the crystallographic structure and composition of the nanocrystalline phases in amorphous Fe 73.5 Cu 1 Nb 3 Si 22.5−x B x (5 x 12) alloys annealed for time durations t A 1 h at temperatures typically in the range 480 • C T A 600 • C. In this range of annealing temperatures, T A , and time durations, t A , there seems to be a broad consensus on the presence of residual amorphous phase and nanocrystalline Fe-Si grains of mean size [3,8,10] 10-20 nm that have the DO 3 structure [5][6][7][8][9][10][11][16][17][18][19][20][21] and a silicon content of 16-22 (at.%), based on the results of phase analysis of the most extensively studied nanocrystalline alloy with x = 9. However, there are reports of bcc Fe-Si nanocrystalline phase [2,4,14] or DO 3 nanocrystalline phase occasionally accompanied by [7] nanocrystalline grains of the tetragonal Fe 3 B structure. For T A > 600 • C and t A 1 h, there is a complete agreement with regard to the presence of DO 3 Fe-Si phase but opinions differ about the existence of additional nanocrystalline phases, e.g., Fe 2 B [22], Fe 3 B [7], Fe 3 (Si, B) [6], Fe 23 B 6 [8], (Fe, Si) 3 B [9], Fe 2 B and Fe 3 B [5], and Fe 23 B 6 and Fe 2 B [23,24].…”

Section: Introductionmentioning

confidence: 99%

“…However, there are reports of bcc Fe-Si nanocrystalline phase [2,4,14] or DO 3 nanocrystalline phase occasionally accompanied by [7] nanocrystalline grains of the tetragonal Fe 3 B structure. For T A > 600 • C and t A 1 h, there is a complete agreement with regard to the presence of DO 3 Fe-Si phase but opinions differ about the existence of additional nanocrystalline phases, e.g., Fe 2 B [22], Fe 3 B [7], Fe 3 (Si, B) [6], Fe 23 B 6 [8], (Fe, Si) 3 B [9], Fe 2 B and Fe 3 B [5], and Fe 23 B 6 and Fe 2 B [23,24]. The presence of Fe-B phases is detrimental [27,28] to the soft magnetic properties because of larger magneto-crystalline anisotropy.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for new crystalline phases formed during early stages of crystallization of amorphous FeCuNbSiB alloys

Basheed¹,

Sarkar²,

Kaul³

2006

J. Phys.: Condens. Matter

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Amorphous FeCuNbSiB alloys with composition near Fe 73.5 Cu 1 Nb 3 Si 13.5 B 9 (the well-studied FINEMET alloy) were annealed at 520 • C for different durations of time, t A , varying from 3 to 20 min. Detailed investigation of the structure and composition of crystalline phases formed during the initial stages of crystallization in these alloys using techniques such as xray diffraction, Mössbauer spectroscopy, scanning electron microscopy, atomic force microscopy and energy dispersive absorption of x-rays, revealed the following. New crystalline phases, tetragonal Fe 3 B and hexagonal Fe 2 Si, not reported previously, exist in all the nanocrystalline alloys in question in contrast to the well-documented cubic Fe-Si phase with the DO 3 structure which coexists with the Fe 3 B and Fe 2 Si phases in some compositions only. The crystallization of Fe 3 B and Fe 2 Si nanocrystalline grains starts at the surface of the ribbons and then proceeds to the bulk whereas the crystallization of DO 3 Fe-Si gets initiated within the bulk. The average size of the nanocrystalline grains of the Fe 3 B and Fe 2 Si and cubic DO 3 Fe-Si structures in the residual amorphous matrix is around 20 nm but their volume fractions are as low as ≈5%, 10%, and 7%, respectively. The cubic Fe-Si nanocrystals of the DO 3 structure have a silicon concentration in the range 15-20 at.%. The magnetic moments in the amorphous precursor point, on average, are 40 • out of the ribbon plane while in the nanocrystalline alloys this angle varies between 2 • and 19 • depending on the Fe concentration.

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X-ray diffraction study of the crystallization of amorphous FeBSiCuNb alloys

Mattern

Danzig

Müller

et al. 1993

Phys. Stat. Sol. (a)

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The short‐range structure of annealed amorphous FeBSiCuNb alloys is investigated by means of X‐ray diffraction. At temperatures higher than 450 °C b.c.c. Fe(Si) is formed in an amorphous matrix. The crystallization is accompanied by a change of the local symmetry of Fe atom environment. The short‐range order of the formed crystalline Fe(Si) phase is not realized in the amorphous as‐quenched state. Due to the precipitation of iron and silicon during crystallization the chemical composition and the short‐range order of the amorphous matrix are changed.

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Structure, magnetic properties and Mössbauer spectroscopy of amorphous and nanocrystalline Fe73.5Cu1Nb3Si16.5B6

Cited by 41 publications

References 4 publications

Change in Magnetic Anisotropy at the Surface and in the Bulk of FINEMET Induced by Swift Heavy Ion Irradiation

Change in Magnetic Anisotropy at the Surface and in the Bulk of FINEMET Induced by Swift Heavy Ion Irradiation

Evidence for new crystalline phases formed during early stages of crystallization of amorphous FeCuNbSiB alloys

X-ray diffraction study of the crystallization of amorphous FeBSiCuNb alloys

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