Modified spin-wave theory applied to one-dimensional Heisenberg ferromagnet with the nearest-neighbor and next-nearest-neighbor exchange anisotropies
Modified spin-wave theory applied to one-dimensional Heisenberg ferromagnet with the nearest-neighbor and next-nearest-neighbor exchange anisotropies
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修正自旋波理论应用于具有最近邻和次近邻交换各向异性的一维海森堡铁磁体
DOI：
10.1142/s0217979219501066
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发表时间：
2019-05
影响因子：
1.7
通讯作者：
Wen An Li
中科院分区：
文献类型：
--
作者：
Yun Liao;Yuan Chen;Ji Pei Chen;Wen An Li
利用改进的自旋波理论研究了具有最近邻和次近邻交换各向异性的一维海森堡铁磁体。用自洽方法研究了系统的基态和低温特性。研究发现，在低温区，神经网络各向异性对热力学量的影响强于神经网络各向异性。得到了比热最大值的位置和高度及其系数以及磁化率系数的各向异性依赖行为（幂律、指数律和线性律）。比热及其系数均表现出由各向异性和神经网络相互作用引起的低温双极大值。在极低温度下，在临界点J2/J1 = - 0.25处，比热和磁化率分别表现为T[公式：见文]和T[公式：见文]，其中J1和J2分别为NN和NNN相互作用。
The modified spin-wave theory is used to investigate the one-dimensional Heisenberg ferromagnet with the nearest-neighbor (NN) and next-nearest-neighbor (NNN) exchange anisotropies. The ground-state and low-temperature properties of the system are studied within the self-consistent method. It is found that the effect of the NN anisotropy on the thermodynamic quantities is stronger than that of the NNN anisotropy in the low-temperature region. The anisotropy dependence behaviors (such as the power, exponential and linear laws) are obtained for the position and the height of the maximum of the specific heat and its coefficient, as well as the susceptibility coefficient. The specific heat and its coefficient both display the low-temperature double maxima which are induced by the anisotropies and the NNN interaction. In the very low temperatures the specific heat and the susceptibility behave severally as T[Formula: see text] and T[Formula: see text] at the critical point J2/J1 = −0.25, where J1 and J2 are the NN and NNN interactions, respectively.
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影响因子：
3.7
作者：
Dayasindhu Dey;Manoranjan Kumar;S. Dutton;R. Cava;Z. Soos
通讯作者：
Dayasindhu Dey;Manoranjan Kumar;S. Dutton;R. Cava;Z. Soos
DOI：
10.1140/epjb/e2007-00082-x
发表时间：
2007-03
期刊：
The European Physical Journal B
影响因子：
--
作者：
G. M. Rocha-Filho;A. Pires;M. E. Gouvea
通讯作者：
G. M. Rocha-Filho;A. Pires;M. E. Gouvea
影响因子：
3.7
作者：
H. Francis Song;N. Laflorencie;S. Rachel;K. Le Hur
通讯作者：
H. Francis Song;N. Laflorencie;S. Rachel;K. Le Hur
影响因子：
1.7
作者：
Miki Yamada;Minoru Takahashi
通讯作者：
Miki Yamada;Minoru Takahashi
影响因子：
3.7
作者：
C. Dupas;J. Renard;J. Seiden;A. Cheikh-rouhou
通讯作者：
C. Dupas;J. Renard;J. Seiden;A. Cheikh-rouhou