Magnetic properties and magnetostriction of PrxNd1-xFe1.9 (0 <= x <= 1.0) alloys at low temperature

作者：Wang Yong; Tang Shao Long^*; Li Yu Long; Xie Ren; Du You Wei

来源：Chinese Physics B, 2013, 22(3): 037503.

DOI：10.1088/1674-1056/22/3/037503

• magnetostriction
• rare-earth compounds
• cubic Laves phase
• high-pressure annealing

The crystal structure, magnetic and magnetostrictive properties of high-pressure synthesized PrxNd1-xFe1.9 (0 <= x < 1.0) alloys were studied. The alloys exhibit single cubic Laves phase with MgCu2-type structure. The initial magnetization curve reveals that Pr0.2Nd0.8Fe1.9 has a minimum magnetocrystalline anisotropy at 5 K. The magnetostriction curve at 5 K shows that Pr0.2Nd0.8Fe1.9 has a very good low-field magnetostrictive property, and the magnetostriction of the PrxNd1-xFe1.9 alloy in high magnetic field is attributable mainly to Pr. The temperature dependence of the magnetostriction (lambda(parallel to)) at the field of 5 kOe shows that the substitution of Nd reduces the K-1 remarkably, and the values of lambda(parallel to) of Pr0.2Nd0.8Fe1.9 and Pr0.8Nd0.2Fe1.9 alloys are nearly five times larger than that of the PrFe1.9 alloy below 50 K; the lambda(parallel to) of Pr0.8Nd0.2Fe1.9 reaches up to 1082 ppm at 100 K, which makes it a potential candidate for application in this temperature range.

• 出版日期2013-3
• 单位南京大学