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提出一种新反铁磁定膨胀合金γ-Fe-Mu-Cr-Al的合金设计方法,研究了Mn、Al及Cr对γ-Fe-Mn合金的反铁磁转变与伴随的热膨胀和电阻率反常行为的影响.Mn升高反铁磁转变温度(T_N),降低磁化率(χ),使T_N点以下的自发体积磁致伸缩ωs(T)他大;Al的作用与Mn相反;Cr对T_N、χ-T与ρ-T关系的影响较小,但略增大ωs(T).在yFe-Mn(23～31wt％)基体中由Mn(r及用的优化组合,研制出具有良好综合性能的金γ-Fe-Mu-Cr-Al系反铁磁定膨胀合金,并已成功地应用于导航仪.根据弱巡游电子反铁磁理论模型,初步讨论了这种反铁出合金的ωs(T)的物理起源。
A new design method for the new antiferromagnetic alloy γ-Fe-Mu-Cr-Al alloy was proposed. The antiferromagnetic transition of the γ-Fe-Mn alloy with Mn, Al and Cr and its thermal expansion and resistivity (T_N), decrease the magnetic susceptibility (χ) and make the spontaneous volume magnetostriction ωs (T) larger than T_N; the effect of Al is opposite to that of Mn; the effect of Cr on The relationship between T_N, χ-T and ρ-T has little effect, but slightly increases ωs (T) .In the matrix of yFe-Mn (23-31wt%), The composite γ-Fe-Mu-Cr-Al antiferromagnetic constant expansion alloy has been successfully applied to navigators.According to the weak cruising electron antiferromagnetic theoretical model, this antiferromagnetic alloy The physical origin of ωs (T).