In Sm_2Fe_17-_x.Mx(M=Al, Ga), there was observed a kind of spin-reorientation with temperature. and in (Sm1_-xTm_x)_2Fe_14Al_3, the anisotropy field HA increases as high as 20% from 5.4 up to 6.5 kOe with T_m.
The effect of a partial substitution of Zr, Ga; Co and Ga; Co. Ga and Zr; respectively, for Fe on the structure and magnetic properties of Nd_8.4Fe_87.1B_4.5 alloy prepared by mechanical alloying has been studied in d...The effect of a partial substitution of Zr, Ga; Co and Ga; Co. Ga and Zr; respectively, for Fe on the structure and magnetic properties of Nd_8.4Fe_87.1B_4.5 alloy prepared by mechanical alloying has been studied in detail. It has been shown that, intrinsic coercivity μ0 H_c and maximum magnetic energy product (BH)_max increase for only Zr or Ga-containing samples, which is mainly due to the refinement of soft grains. The combined addition of Co and Ga is less effective for improving μoH_c and (BH)_max than the respective addition of Co or Ga. which may be due to the formation of CsCl-type CoGa. μoH_c and (BH)_max for combined Co, Ga. Zr-added alloy are higher than those for the combined Co, Ga-added alloy but lower than those for only Zr-containing alloy.展开更多
A method based on the measurement of Fe average atomic magnetic moment to identify the structural transition caused by the increase of Ga content in quenched Fe1-xGax alloys （0.15 ≤ x ≤0.30） is proposed. The quenc...A method based on the measurement of Fe average atomic magnetic moment to identify the structural transition caused by the increase of Ga content in quenched Fe1-xGax alloys （0.15 ≤ x ≤0.30） is proposed. The quenched Fe1-xGax alloys show a change of the Fe average atomic magnetic moment from 2.25μB to 1.78μB and then to 1.58μB, which corresponds to the structural transition from A2 to D03 and then to B2. The relationship between the structure and the magnetostriction is clarified, and the maximum magnetostriction appears in the A2 phase. The variation tendency of the magnetostriction is well characterized, which also reflects the structural transition.展开更多
1.IntroductionIn this work Ga and Co were added inthe Nd-Fe-B alloys to increase the Curietemperature and improve the temperaturedependence.The improvement of alloy per-formance and the mechanism of coercivitywith the...1.IntroductionIn this work Ga and Co were added inthe Nd-Fe-B alloys to increase the Curietemperature and improve the temperaturedependence.The improvement of alloy per-formance and the mechanism of coercivitywith the additions of Ga and Co elementsare reported.The Curie temperature of the展开更多
文摘In Sm_2Fe_17-_x.Mx(M=Al, Ga), there was observed a kind of spin-reorientation with temperature. and in (Sm1_-xTm_x)_2Fe_14Al_3, the anisotropy field HA increases as high as 20% from 5.4 up to 6.5 kOe with T_m.
基金National Natural Science Foundation of China!59571014National Natural Science Foundation of China!59725103National Natur
文摘The effect of a partial substitution of Zr, Ga; Co and Ga; Co. Ga and Zr; respectively, for Fe on the structure and magnetic properties of Nd_8.4Fe_87.1B_4.5 alloy prepared by mechanical alloying has been studied in detail. It has been shown that, intrinsic coercivity μ0 H_c and maximum magnetic energy product (BH)_max increase for only Zr or Ga-containing samples, which is mainly due to the refinement of soft grains. The combined addition of Co and Ga is less effective for improving μoH_c and (BH)_max than the respective addition of Co or Ga. which may be due to the formation of CsCl-type CoGa. μoH_c and (BH)_max for combined Co, Ga. Zr-added alloy are higher than those for the combined Co, Ga-added alloy but lower than those for only Zr-containing alloy.
基金Project supported by the National Science Fund for Distinguished Young Scholars of China (Grant No.50925101)the Innovation Foundation of Beihang University for Ph.D.Graduates,China
文摘A method based on the measurement of Fe average atomic magnetic moment to identify the structural transition caused by the increase of Ga content in quenched Fe1-xGax alloys （0.15 ≤ x ≤0.30） is proposed. The quenched Fe1-xGax alloys show a change of the Fe average atomic magnetic moment from 2.25μB to 1.78μB and then to 1.58μB, which corresponds to the structural transition from A2 to D03 and then to B2. The relationship between the structure and the magnetostriction is clarified, and the maximum magnetostriction appears in the A2 phase. The variation tendency of the magnetostriction is well characterized, which also reflects the structural transition.
文摘1.IntroductionIn this work Ga and Co were added inthe Nd-Fe-B alloys to increase the Curietemperature and improve the temperaturedependence.The improvement of alloy per-formance and the mechanism of coercivitywith the additions of Ga and Co elementsare reported.The Curie temperature of the
