Temperature dependence of anisotropy fields and initial susceptibilities in R2Fe14B compounds

Größinger, R.; Sun, X.K.; Eibler, R.; Buschow, K.H.J.; Kirchmayr, H.

doi:10.1016/0304-8853(86)90122-8

Cited by 122 publications

(23 citation statements)

References 5 publications

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“…This value is somewhat higher than the 931.1 kA/m at 22 • C that was reported for a Ce 2 Fe 14 B single crystal [3,4]. Our value of 28.1 kOe for H A at 25 • C is also higher than the 26.4 kOe previously reported [5,37] using the same SPD method. This might be due to the presence of other secondary phases, such as iron.…”

Section: Resultscontrasting

confidence: 48%

“…Saturation magnetizations (M S ) and anisotropy fields (H A ) were measured using a Quantum Design physical property measurement system (PPMS-9T). The demagnetization data were taken on bulk samples in external fields of up to 50 kOe at 25 • C. H A was determined by the singular point detection (SPD) method, using second derivative of magnetization (d 2 M/dH 2 ) [34][35][36][37]. A Perkin-Elmer 7 Series thermogravimetric analyzer (TGA) was used to determine the Curie temperatures (T C ) of the materials by observing the temperature dependence of the force exerted on the sample in a small magnetic field gradient provided by a permanent magnet placed close to the sample.…”

Section: Methodsmentioning

confidence: 99%

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Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

et al. 2018

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Featured Application: This is a contribution towards developing low-cost Fe-based permanent magnets that are suitable for the automobile industry.Abstract: Intrinsic magnetic properties (saturation magnetization, anisotropy fields, and Curie temperatures) of Ce 2 Fe 14 B doped with Al, Ni, and Si are presented. Substitution for Fe by these elements leads to the formation of solid solutions that crystallize in the tetragonal Nd 2 Fe 14 B structure. Substituting Al, Ni, or Si for Fe leads to a decrease in both the saturation magnetization and the anisotropy field of Ce 2 Fe 14 B. Ni and Si increase the Curie temperature of Ce 2 Fe 14 B while Al reduces it. While, for the Ce 2 (Fe 14−x T x )B containing Ni, a maximum Curie temperature of 210 • C was observed at 9 atom % Ni (x = 1.45), the highest value of 252 • C was found for the Ce 2 Fe 14 B containing 14 atom % Si (x = 2.26).

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Section: Resultscontrasting

confidence: 48%

Section: Methodsmentioning

confidence: 99%

Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

et al. 2018

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“…The negligible magnitude of K 2 in comparison with K 1 is a common feature of the R-Fe intermetallics with a nonmagnetic R. We will discuss below only K 1 . The magnetic anisotropy of Lu 2 Fe 14 B has been studied on polycrystals using a singular-point detection method [16]. K 1 was estimated to be by 20% larger than that obtained in our study.…”

Section: Resultsmentioning

confidence: 94%

Effect of hydrogen on magnetic properties of Lu2Fe14B single crystal

Терешина¹,

Andreev²,

Drulis³

et al. 2005

Journal of Alloys and Compounds

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“…The values of HI used in Eq. (4) were taken from the paper of Grossinger et al [ 17] and MK(T) was calculated by extrapolating the high field data. The results for the plots of H4/Ms vs. Ha/Ms for all samples were linear and gave well characterized values of t and Neff, as evidenced by the data for the 0, 30 and 70% deformed samples shown in Fig.…”

Section: Coercivity and Crystallographic Alignment Relationsmentioning

confidence: 99%

The Coercivity – Remanence Tradeoff in Nanocrystalline Permanent Magnets

Lewis

Crew

2001

MRS Proc.

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The energy product (BH),ax is a figure of merit quantifying the maximum amount of useful work that can be performed by the magnet. The energy product is detenrmined by the magnetic remanence and the coercivity which, as extrinsic properties, are determined by the magnets' microstructure. Thus, in principle, magnetic material microstmctures may be tailored to obtain defined parameters to produce optimal permanent magnets. However, as asserted by the eponymous Murphy, "Nature favors the hidden flaw". While there is still much undeveloped potential in nanomagnetic materials, with relevant length scales on the order of 100 A, accumulating evidence strongly suggests that maximum remanence and maximum coercivity are mutually exclusive in nanocrystalline magnetic materials. Diverse experimental and computational results obtained from nanocrystalline Nd 2 FeI 4 B-based magnets produced by meltspinning techniques and subjected to various degrees of thermomechanical deformation confirm this conclusion. Recent results obtained from temperature-dependent magnetic measurement, magnetic force microscopy and simple micromagnetic modeling will be reviewed and summarized. The results, while somewhat discouraging, do hint at possible materials design routes to sidestep the inherent performance limitations of the magnetic nanostructures.

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Temperature dependence of anisotropy fields and initial susceptibilities in R2Fe14B compounds

Cited by 122 publications

References 5 publications

Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

Effect of hydrogen on magnetic properties of Lu2Fe14B single crystal

The Coercivity – Remanence Tradeoff in Nanocrystalline Permanent Magnets

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