中国有色金属学报(英文版)
中國有色金屬學報(英文版)
중국유색금속학보(영문판)
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2014年
4期
1053-1057
,共5页
曹伽牧%谭昌龙%田晓华%李钦赐%郭二军%王丽萍%曹一江
曹伽牧%譚昌龍%田曉華%李欽賜%郭二軍%王麗萍%曹一江
조가목%담창룡%전효화%리흠사%곽이군%왕려평%조일강
磁性形状记忆合金%Ni-Mn-Sn%第一性原理计算%磁性质
磁性形狀記憶閤金%Ni-Mn-Sn%第一性原理計算%磁性質
자성형상기억합금%Ni-Mn-Sn%제일성원리계산%자성질
ferromagnetic shape memory alloys%Ni-Mn-Sn%first-principles calculation%magnetic properties
采用第一性原理计算揭示了Co掺杂对Ni-Mn-Sn形状记忆合金磁性质的影响。结果表明,掺杂Co使Ni-Mn-Sn合金中两相饱和磁化强度差增大的原因在于其奥氏体的Mn-Mn磁交换作用由反铁磁性转变为铁磁性。奥氏体的顺磁态与铁磁态的能量差对Ni-Co-Mn-Sn的磁转变有重要影响。此外,Co掺杂对磁性的影响与Mn 3d态的改变有关。
採用第一性原理計算揭示瞭Co摻雜對Ni-Mn-Sn形狀記憶閤金磁性質的影響。結果錶明,摻雜Co使Ni-Mn-Sn閤金中兩相飽和磁化彊度差增大的原因在于其奧氏體的Mn-Mn磁交換作用由反鐵磁性轉變為鐵磁性。奧氏體的順磁態與鐵磁態的能量差對Ni-Co-Mn-Sn的磁轉變有重要影響。此外,Co摻雜對磁性的影響與Mn 3d態的改變有關。
채용제일성원리계산게시료Co참잡대Ni-Mn-Sn형상기억합금자성질적영향。결과표명,참잡Co사Ni-Mn-Sn합금중량상포화자화강도차증대적원인재우기오씨체적Mn-Mn자교환작용유반철자성전변위철자성。오씨체적순자태여철자태적능량차대Ni-Co-Mn-Sn적자전변유중요영향。차외,Co참잡대자성적영향여Mn 3d태적개변유관。
The effect of Co substitution on magnetic properties of Ni-Mn-Sn shape memory alloy was revealed by first-principles calculations. Large magnetization difference in Ni-Mn-Sn alloy obtained by addition of Co arises from enhancement of magnetization of austenite due to change of Mn-Mn interaction from anti-ferromagnetism to ferromagnetism. Total energy difference between paramagnetic and ferromagnetic austenite plays an important role in magnetic transition of Ni-Co-Mn-Sn. The altered Mn 3d states due to Co substitution give rise to difference in magnetic properties.