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The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr_2Fe_(14)B/α-Fe alloys prepared by melt spinning.It was shown that the magnetic properties of Pr_2Fe_(14)B/α-Fe nanocomposite were improved by an addition of 10 at.%CoCr,in particular,coercivity(_jH_c) from 4.9 up to 5.3 kOe,maximum energy product((BH)max from 10.6 up to 13.9 MGOe,and remanence(M_r) from 94.2 up to 98.4 emu/g.The field dependencies of the reversible and irreversible magnetization components were derived from the recoil loops.Combining with the initial magnetization curves,the results indicated that the pinning of domain walls at the grain boundaries dominated the magnetization reversal in Pr_2Fe_(14)B/α-Fe nanocomposite alloys.The magnetic memory effect was studied by measuring the magnetic moment relaxation at a cycle negative magnetic field with time interval of 600 s.The exchange-spring magnets with magnetic memory effect have a high potential for high density magnetic recording.
The influence of CoCr addition on the microstructure and magnetic properties was investigated in nanocomposite Pr_2Fe_ (14) B / α-Fe alloys prepared by melt spinning. It has been shown that the magnetic properties of Pr_2Fe_ (14) B / α-Fe nanocomposite were improved by an addition of 10 at.% CoCr, in particular, coercivity (_jH_c) from 4.9 up to 5.3 kOe, maximum energy product ((BH) max from 10.6 up to 13.9 MGOe, and remanence (M_r) from 94.2 up to 98.4 emu / g. The field dependencies of the reversible and irreversible magnetization components were derived from the recoil loops. Combining with the initial magnetization curves, the results indicated that the pinning of domain walls at the grain boundaries dominated the magnetization reversal in Pr_2Fe_ (14) B / α-Fe nanocomposite alloys was studied by measuring the magnetic moment relaxation at a cycle negative magnetic field with time interval of 600 s. The exchange-spring magnets with magnetic memory effect have a high potential for high density magnetic recording.