Magnetic and magnetostrictive properties in high-pressure synthesized Dy1−xPrxFe1.9(0≤x≤1) cubic Laves alloys

Progress in bulk MgCu2-type rare-earth iron magnetostrictive compounds

“…The magnetostrictive and anisotropic properties of PrFe 2 were clearly addressed by Tang and his colleagues using the samples prepared under high pressure. [89][90][91][92][93][94] Excellent magnetostrictive property comparable to that of Terfenol-D was found in Pr 0.9 Tb 0.1 Fe 1.9 . [89] In Tb x Pr 1−x Fe 1.9 compounds, the normalized λ ‖ − λ ⊥ of Tb 0.05 Pr 0.95 (Fe 0.8 Co 0.2 ) 1.9 attains a large at a relatively weak magnetic field, suggesting much easier saturation, which indicates that this alloy has lower anisotropy than the others, a possible composition for compensation of anisotropy.…”

“…[93] Although at RT the EMD of DyFe 2 lies along [100] (the same as that of CeFe 2 , NdFe 2 , and HoFe 2 ), a direct evidence for the anisotropy compensation between Dy 3+ and Pr 3+ ions has not been found in Dy 1−x Pr x Fe 1.9 synthesized at high pressure. [94] The possible reason may come from the much larger anisotropy of Dy 3+ than that of Ce 3+ , Nd 3+ , and Ho 3+ , the composition for compensation of anisotropy should be very close to PrFe 2 , e.g., x > 0.90, but the experimental composition is absent between 0.9 and 1.0. [93] Pr 0.7 Ce 0.3 Fe 1.9…”

Dy substitution effect on the temperature dependences of magnetostriction in Pr 1– x Dy x Fe 1.9 alloys

“…This indicates that the magnetocrystalline anisotropy of the alloys with 0 ≤ x ≤ 0.2 is larger than that of the alloys with 0.2 ≤ x ≤ 1.0 at 5 K. This tendency is similar to the results of the Dy 1−x Pr x (Fe 0.9 B 0.1 ) 1.93 system and Dy 1−x Pr x Fe 1.9 system at room temperature. [4,14] In high-magnetic field (10 ≤ H ≤ 90 kOe), Dy substitution reduces the magnetostriction. The magnetostriction decreases sharply from 5000 ppm (x = 0.0) to 320 ppm (x = 1.0) in a magnetic field of 90 kOe.…”

Ferroelectric and magnetic properties in high-pressure synthesized BiFeO3 compound

“…This mixture was pressed into disk and precalcined at 750 • C for 3 h. The precursor mixture (about 1 g for a sample) was then calcined at 800 • C for 40 min at a pressure of 6 GPa by a hexahedral anvil high-pressure annealing apparatus. The details of the high-pressure annealing apparatus were described before [14]. After calcining, the samples were quickly cooled to room temperature, and the pressure was slowly released to the normal pressure.…”