南京师大学报(自然科学版)
南京師大學報(自然科學版)
남경사대학보(자연과학판)
JOURNAL OF NANJING NORMAL UNIVERSITY (NATURAL SCIENCE EDITION)
2012年
2期
39-44
,共6页
多铁%第一性原理%电子结构%磁属性
多鐵%第一性原理%電子結構%磁屬性
다철%제일성원리%전자결구%자속성
multiferroic%first-principles%electronic structure%magnetic properties
利用第一性原理方法研究了一系列正交结构锰酸盐Gd1-xHoxMnO3(0.0≤x≤0.5)的电子结构和磁学性质.我们研究的所有组分的Gd1xHoxMnO3都能保持单一的立方结构,单胞的体积也随着x的增大线性减小,Mn -O - Mn键的键角也随着Ho的掺杂而线性的减小.我们的磁属性研究表明随着Ho的掺杂反铁磁-E相变越来越稳定,Mn的磁矩随着x的增大基本不变.
利用第一性原理方法研究瞭一繫列正交結構錳痠鹽Gd1-xHoxMnO3(0.0≤x≤0.5)的電子結構和磁學性質.我們研究的所有組分的Gd1xHoxMnO3都能保持單一的立方結構,單胞的體積也隨著x的增大線性減小,Mn -O - Mn鍵的鍵角也隨著Ho的摻雜而線性的減小.我們的磁屬性研究錶明隨著Ho的摻雜反鐵磁-E相變越來越穩定,Mn的磁矩隨著x的增大基本不變.
이용제일성원리방법연구료일계렬정교결구맹산염Gd1-xHoxMnO3(0.0≤x≤0.5)적전자결구화자학성질.아문연구적소유조분적Gd1xHoxMnO3도능보지단일적립방결구,단포적체적야수착x적증대선성감소,Mn -O - Mn건적건각야수착Ho적참잡이선성적감소.아문적자속성연구표명수착Ho적참잡반철자-E상변월래월은정,Mn적자구수착x적증대기본불변.
Using first-principles density functional theory within the generalized gradient approximation method,the effect of electronic and magnetic properties of a series of orthorhombic manganites Gd1-xHoxMnO3 (0.0 ≤x ≤0.5 ) have been studied.For all concentrations we find that the single orthorhombic structure in Gd1 -xHoxMnO3 can be maintained and the volume of the unit cell can almost be linear decreasing with x.It is found that the Mn - O - Mn bond angle decreases almost linearly with the Ho doping which originates the enhanced electric polarization in Gd1 -xHoxMnO3.The AFM-E phase becomes more stable due to the Ho doping and the local magnetic moment of Mn is basically constant for all x in Gd1-xHoxMnO3 based on the magnetic properties calculations.