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【求助】MS 磁性結(jié)果分析!
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我算了兩個體系,結(jié)果如下: 1 2*Integrated Spin Density = -3.99911 2*Integrated |Spin Density| = 4.25707 2 2*Integrated Spin Density = 2.00014 2*Integrated |Spin Density| = 3.54282 第二個應(yīng)該是鐵磁性,第一個示范鐵磁還是鐵磁?請指教。 還想問一下,MS里怎么自己設(shè)置反鐵磁與鐵磁態(tài)? 謝謝 |
搜資料 |
榮譽版主 (職業(yè)作家)
小木蟲之蓮花佛
木蟲 (正式寫手)
Dr.

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這個問題關(guān)注的很多,就是沒有人回答,我還沒有搞懂 轉(zhuǎn) 西安交大分子模擬論壇 貼,跟大家討論阿 如何根據(jù)自旋DOS積分來判斷體系的磁性-castep-out put file 在CASTEP計算完畢輸出文件output-files中如果體系采用了自旋極化計算方法,一般有下面結(jié)果輸出: 2*Integrated Spin Density = 0.934374E-01 2*Integrated |Spin Density| = 0.104526 Final energy, E = -14786.05701927 eV Final free energy (E-TS) = -14786.10608945 eV (energies not corrected for finite basis set) NB est. 0K energy (E-0.5TS) = -14786.08155436 eV 注意到紅色字體部分,2×Integrated Spin Density表示自旋極化DOS積分結(jié)果,也就是自旋up和down通道積分后然后加到一起; 2*Integrated |Spin Density|表示自旋極化DOS絕對值積分相加;2表示自旋磁矩g因子。通過這個參數(shù)可以初步判斷結(jié)構(gòu)的磁性: After the last SCF iteration CASTEP prints out total spin (number of unpaired electrons) and also integrated |spin|. If the two numbers are very close and are very small, then the system is paramagnetic. If they are close and finite, the system is ferromagnetic. If integrated |spin| is finite, but integrated spin itself is close to zero - system is antiferromagnetic. Finally, if both numbers are finite, and the difference between them is also finite, you have a ferrimagnetic. 上面2*Integrated Spin Density = -3.99911 負(fù)值怎么理解? |
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