scholarly journals Electronic structures and Curie temperatures of iron-based rare-earth permanent-magnet compounds

1995 ◽  
Vol 51 (2) ◽  
pp. 1064-1072 ◽  
Author(s):  
J. P. Woods ◽  
B. M. Patterson ◽  
A. S. Fernando ◽  
S. S. Jaswal ◽  
D. Welipitiya ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Electronic Structures ◽  
Iron Based ◽  
Curie Temperatures

Studies of Substituted R2 T14 B and R2 Co17 Systems (T = Fe or Co)

1987 ◽  
Vol 96 ◽  
Author(s):  
W. E. Wallace ◽  
A. T. Pedziwiatr ◽  
E. B. Boltich ◽  
H. Kevin Smith ◽  
S. Y. Jiang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Recent Work ◽  
Magnetic Behavior ◽  
Auger Spectroscopy ◽  
High Energy ◽  
Planar Anisotropy ◽  
Permanent Magnet Materials ◽  
Spectroscopy Studies ◽  
Curie Temperatures

ABSTRACTCertain R2Co17 and R2 T14 B systems (R = a rare earth, T = Fe or Co) are of significance for use in the fabrication of high energy magnets. Improvements in these systems as high energy magnet materials are effected by partially replacing Co or T by appropriate d transition metals. A description is given of the magnetic behavior of a number of systems based on R2 Co17 and R2T14 B. Also, an account is given of recent work dealing with the systems RCo4 B and PrCo4-xFex B. The latter materials have large magnetizations and high Curie temperatures. However, they are not useful permanent magnet materials because they exhibit planar anisotropy.Results of some Auger spectroscopy studies of R2 Fe14 B systems (R = Pr,Nd or Er) are presented. This work shows the intergranular region to be rich in B, O and R. This region is undoubtedly non-magnetic, a feature which is most probably of significance in regard to the observed coercivity of R2 Fe14 B magnets.

Anisotropy and Microstructure of Rare Earth Permanent Magnet Materials.

1984 ◽  
Author(s):  
J. Fidler ◽  
R. Groessinger ◽  
H. Kirchmayr ◽  
P. Skalicky
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Permanent Magnet Materials

scholarly journals Comparison between rare-earth and ferrite permanent magnet flux-switching generators for gearless wind turbines

2020 ◽  
Vol 6 ◽  
pp. 1365-1369
Author(s):  
Vladimir Prakht ◽  
Vladimir Dmitrievskii ◽  
Vadim Kazakbaev ◽  
Mohamed N. Ibrahim
Keyword(s):  
Rare Earth ◽  
Permanent Magnet ◽  
Wind Turbines

scholarly journals Magnetic Gears and Magnetically Geared Machines with Reduced Rare-Earth Elements for Vehicle Applications

2021 ◽  
Vol 12 (2) ◽  
pp. 52
Author(s):  
Ali Al-Qarni ◽  
Ayman EL-Refaie
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Permanent Magnet ◽  
Electric Vehicles ◽  
Scaling Up ◽  
Electrical Machines ◽  
Mechanical Structure ◽  
Physical Isolation ◽  
Rotational Components ◽  
Rare Earth Content

This paper covers a new emerging class of electrical machines, namely, Magnetic Gears (MGs) and Magnetically Geared Machines (MGMs). This particular kind of gears/machines is capable of either scaling up or down the revolutions-per-minute to meet various load profiles as in the case of mechanical gearboxes, but with physical isolation between the rotating components. This physical isolation between the rotational components leads to several advantages in favor of MGs and MGMs over mechanical gearboxes. Although MGs and MGMs can potentially provide a solution for some of the practical issues of mechanical gears, MGs and MGMs have two major challenges that researchers have been trying to address. Those challenges are the high usage of rare-earth Permanent Magnet (PM) materials and the relatively complex mechanical structure of MGs and MGMs, both of which are a consequence of the multi-airgap design. This paper presents designs that reduce the PM rare-earth content for Electric Vehicles (EVs). Additionally, the paper will ensure having practical designs that do not run the risk of permanent demagnetization. The paper will also discuss some new designs to simplify the mechanical structure.

ChemInform Abstract: New Ternary Rare-Earth Metal Boride Carbides R15B4C14 (R: Y, Gd-Lu) Containing BC2 Units: Crystal and Electronic Structures, Magnetic Properties.

ChemInform ◽  
2010 ◽  
Vol 42 (4) ◽  
pp. no-no
Author(s):  
Volodymyr Babizhetskyy ◽  
Arndt Simon ◽  
Hansjuergen Mattausch ◽  
Kurt Hiebl ◽  
Chong Zheng
Keyword(s):  
Magnetic Properties ◽  
Rare Earth ◽  
Rare Earth Metal ◽  
Electronic Structures ◽  
Earth Metal ◽  
Metal Boride
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