The magnetic state and its macroscopic anisotropy in amorphous rare
The magnetic state and anisotropy of amorphous rare‐earth transition‐metal systems with a microscopic random uniaxial anisotropy are discussed. Both sputtered Tb‐Fe and rapidly quenched Gd 65−x R x Co 35 alloys (R is a rare earth) were studied. The low‐temperature magnetic state of these alloys depends on the anisotropy, exchange, …
Two‐ and three‐dimensional calculation of remanence enhancement of rare
Micromagnetic calculations using a finite element technique rigorously describe the magnetic properties of novel, isotropic rare‐earth‐based composite magnets. Numerical results obtained for a composite material of Nd2Fe14B, SmCo5 or Sm2(Fe0.8Co0.2)17N2.8 and α‐Fe particles show that remanence, coercivity, and coercive squareness sensitively …
Developments and Prospect of the Rare Earth Permanent-magnet …
Abstract. The rare earth permanent-magnet alloys are the broadly used foundational functional materials. Rare earth permanent-magnet alloys have achieved great progress in scientific research, manufacturing and application in recent few decades, and their applications have pervaded into every region of national economy.
Enhanced tunable mid-infrared emissions by controlling rare earth …
There are several methods for fabricating MIR lasers including the semiconductor technology, nonlinear techniques, and direct mission of dopant ions; particularly, rare earth (RE) ion-doped solid-state lasers have dominated the laser market [5]. However, MIR laser technology is poorly developed and the output power and …
Cobalt‐free permanent magnet materials based on iron‐rare‐earth …
Cobalt‐free permanent magnet materials based on iron‐rare‐earth alloys (invited) G. Hadjipanayis, R. Hazelton, K. Lawless. Published 15 March 1984. Materials Science, Physics. Journal of Applied Physics. The magnetic properties of rapidly quenched FeRM alloys where R=La,Y,Pr,Nd,Gd and M=B,Si,Al,Ga,Ge have been investigated over a …
(INVITED)Rare-earth ions doped glasses based on TeO2 …
(INVITED)Rare-earth ions doped glasses based on TeO 2 and GeO 2 with and without nanoparticles used as cover to increase Si solar cell performance: ... Rare-earth ions doped TZO glasses have demonstrated interesting applications. Laser action at 1064 nm could be observed when using different concentration of Nd 3+ ions [32, 33].
Rare earth ions doped optical functional glass and application (Invited)
The luminescence and laser properties of rare earth are produced by the transition of 4f electrons between different energy levels. Due to its special properties, rare earth ions doped optical-functional glass have played important roles in high power laser system, whether as active or passive components. Nd3+, Er3+ doped phosphate laser …
Review of integrated magneto-optical isolators with rare-earth …
Review of integrated magneto-optical isolators with rare-earth iron garnets for polarization diverse and magnet-free isolation in silicon photonics [Invited]. / Srinivasan, Karthik; Stadler, Bethanie J. H. In: Optical Materials Express, Vol. 12, No. 2, 01.02.2022, p. 697-716. Research output: Contribution to journal › Review article › peer ...
The future of rare earth‐transition metal magnets of type RE2TM17 (invited)
A brief review of the development of RE 2 TM 17 permanent magnets is followed by a summary of the state‐of‐the‐art. Excellent magnetic properties have been achieved in the laboratory for single‐phase 2:17 and two‐phase, precipitation hardened magnets of ∼2:15 stoichiometry.
Review of integrated magneto-optical isolators with rare-earth …
Additionally, recent advances in integrated magneto-optical isolators based on rare-earth iron garnets are reviewed in [31]. They are characterized by polarization diversity and ability to operate ...
Invited Presentation: How The Rare Earths Became …
Despite their name, rare earth element s (with the exceptio n of the highly uns table promethium) are re latively plentif ul in the Earth 's crus t, w ith cer ium being the 25th most abundan t ...
Rare earth elements and permanent magnets (invited)
Rare earth (RE) magnets have become virtually indispensible in a wide variety of industries such as aerospace, automotive, electronics, medical, and military. RE elements are essential ingredients in these high performance magnets based on intermetallic compounds RECo5, RE2TM17 (TM: transition metal), and RE2TM14B. Rare …
(Invited) Rare Earth Metal Production Via Chloride …
(Invited) Rare Earth Metal Production Via Chloride Based Molten-Salt Electrolysis - IOPscience. Nicholas Scott Sinclair1, Ruwani Wasalathanthri1, Badri …
Iron‐based rare‐earth magnets (invited) | Semantic Scholar
Rare‐earth iron alloys offer promise for the realization of the highest‐energy product attainable. We have investigated rare‐earth iron alloys by melt spinning and identified compositions that are beneficial for magnet fabrication. Compositions of the type R3Fe16B and R3Fe20B provide high values of coercive force. Processing of the compositions into …
Two‐ and three‐dimensional calculation of remanence enhancement of rare
Micromagnetic calculations using a finite element technique rigorously describe the magnetic properties of novel, isotropic rare‐earth‐based composite magnets. Numerical results obtained for a composite material of Nd 2 Fe 14 B, SmCo 5 or Sm 2 (Fe 0.8 Co 0.2 ) 17 N 2.8 and α‐Fe particles show that remanence, coercivity, and coercive ...
[PDF] Application of permanent magnets in accelerators and …
After an explanation of the general circumstances in which the use of permanent magnets in accelerators is desirable, a number of specific magnets will be discussed. That discussion includes magnets needed for the operation of accelerators as well as magnets that are employed for the utilization of charged particle beams, such as the production of …
Invited paper Intrinsic magnetic properties of new rare-earth …
New rare-earth iron intermetallic compounds have been generated from existing series by the reaction of powder with an appropriate gas at about 500°C. Interstitial atoms occupy sites adjacent to the rare earth, thereby creating a crystal field that reflects the new local symmetry. They also expand the lattice, which greatly modifies the Fe-Fe ...
(INVITED)Infrared luminescence of chalcogenide glasses doped with rare
Incorporating rare earth ions in Ge-based sulfide glass matrix is facilitated in presence of Ga, leading to glasses with higher rare earth content and less clustering. Due to the lower charge of Ga relative to Ge, electron donors such as rare earth dopants act as charge-balancing cations for GaS 4/2 tetrahedra, offering preferred ...
M-edge x-ray absorption spectroscopy of 4f instabilities in rare-earth
@article{osti_5195618, title = {M-edge x-ray absorption spectroscopy of 4f instabilities in rare-earth systems (invited)}, author = {Kaindl, G and Kalkowski, G and Brewer, W D and Perscheid, B and Holtzberg, F}, abstractNote = {Soft x-ray absorption spectroscopy in the M-edge region is explored as a tool for studying 4f instabilities. The quasiatomic M/sub …
Out of the blue: semiconductor laser pumped visible rare‐earth …
The rise of semiconductor-based pump sources such as In x Ga 1-x N-laser diodes or frequency-doubled optically pumped semiconductor lasers with emission wavelengths in the blue encourages a revisitation of the rare-earth ions Pr 3+, Sm 3+, Tb 3+, Dy 3+, Ho 3+ and Er 3+ with respect to their properties as active ions in crystalline …
Theory and Application of Rare Earth Materials | SpringerLink
She was invited to visit the Faculty of Engineering of Iwate University, Japan, to present "Thermodynamics of Rare Earth Alloys". She was also invited to visit the University of Pennsylvania, one of the Ivy League universities in the United States, and gave a report on "Solid Electrolytes and Chemical Sensors".
U.S. Begins Forging Rare Earth Supply Chain
Sloustcher said the heavy rare earths will be refined in a different building, adding that the project is just getting started. To fully domesticate the magnet supply chain, MP Materials also began construction on the United States' first rare earth magnetics factory in April 2022. Located in Fort Worth, Texas, the facility will be able to ...
Crystallization of FeB alloys with rare earths to produce hard …
Among the first crystallized melt quenched alloys to exhibit interesting hard magnetic properties was (Fe 0.82 B 0.18) 0.9 Tb 0.05 La 0.05.The high coercive force of this alloy results from a mixture of R 6 Fe 2 3 and Fe 3 B phases with a very fine grained microstructure (∼300 Å). The hard magnetic state only exists over a narrow range of …
Optically pumped rare-earth-doped Al2O3 distributed …
Rare-earth-doped amorphous aluminum oxide thin films have been deposited onto silicon wafers by RF reactive co-sputtering from metallic Al and rare-earth targets, the spectroscopy and optical gain of Er3+, Yb3+, Nd3+, and Tm3+ ions has been investigated, and the near-infrared laser transitions near 1 μm in Yb3+, 1.5 μm in Er3+, and 2 μm in ...
The future of rare earth‐transition metal magnets of type RE2TM17 (invited)
The future of rare earth‐transition metal magnets of type RE2TM17 (invited) A brief review of the development of RE2TM17 permanent magnets is followed by a summary of the state‐of‐the‐art. Excellent magnetic properties have been achieved in the laboratory for single‐phase 2:17 and two‐phase, precipitation hardened magnets of ∼2:15 ...
Iron‐based rare‐earth magnets (invited)
Rare‐earth iron alloys offer promise for the realization of the highest‐energy product attainable. We have investigated rare‐earth iron alloys by melt spinning and …
Novel Ternary Fe-Rich Rare Earth Intermetallics
Novel Ternary Fe-Rich Rare Earth Intermetallics. The structures and the magnetic properties of some novel ternary compounds were studied. A large number of compounds have the approximate composition RFe10T2, where T represents Cr, V, Ti, Mo, W or Si. The crystal structure of these latter compounds can be derived from the tetragonal ThMn12 ...
Rare earths: global reserves by country 2023 | Statista
Release date. January 2024. Region. Worldwide. Survey time period. 2023. Supplementary notes. REO = rare earth oxides. All figures are estimates. Open this statistic in... Spanish. German.
Platinum‐Rare Earth Alloy Electrocatalysts for the Oxygen …
In this regard, alloying Pt with rare earth metals (REM) has emerged as a promising approach. This short review summarizes and discusses the most relevant advances on Pt-REM alloy electrocatalysts, from bulk polycrystalline surfaces to carbon supported nanostructures, for the oxygen reduction reaction (ORR), and their …
(Invited) A Novel Electrochemical Recycling Method …
(Invited) A Novel Electrochemical Recycling Method for Rare Earth Metals from Scrap Magnets Using Molten Salt Electrolysis and Alloy Diaphragms - IOPscience. …