CAJ | 학술논문

利用Monte-Carlo方法模拟了不同偏心率、不同厚度的椭圆钴纳米环的磁特性.模拟结果表明：当系统的偏心率较小时,厚度越大的椭圆钴纳米环的涡旋态（＂vortex＂态）越稳定,此系统的磁滞回线保持圆形纳米环的主要特征;系统的偏心率较大时,系统的磁特性与圆形纳米环有较大差别,涡旋态的稳定性与厚度并无明显关联;对椭圆钴纳米环的自旋组态分析发现,椭圆系统在极化态（＂onion＂态）与涡旋态之间出现了更多的亚稳态.
이용Monte-Carlo방법모의료불동편심솔、불동후도적타원고납미배적자특성.모의결과표명：당계통적편심솔교소시,후도월대적타원고납미배적와선태（＂vortex＂태）월은정,차계통적자체회선보지원형납미배적주요특정;계통적편심솔교대시,계통적자특성여원형납미배유교대차별,와선태적은정성여후도병무명현관련;대타원고납미배적자선조태분석발현,타원계통재겁화태（＂onion＂태）여와선태지간출현료경다적아은태.
Based on the Monte-Carlo simulation,the effects of different thickness and eccentricity for ellipse Co nanorings were studied.It was found that the stability of vortex-type states increases with increasing the thickness of ellipse Co nanorings when eccentricity was less.Moreover,the magnetic hysteresis loops of this system were similar to those of circular Co nanorings.However,there exists obvious difference between magnetic hysteresis loops of ellipse Co nanorings and those of circular Co nanorings when the eccentricity increased.The stability of vortex-type state was not significantly associated with the thickness.From the spin configurations,it was observed that there were more metastable states in the system of ellipse Co nanorings than those of circular Co nanorings.