| 1. | Zero - temperature magnetic properties of ferromagnetic double layers with interlayer antiferromagnetic coupling
复合层合管强度的理论计算 |
| 2. | The spin operator ' s commutation relations in one dimensional quantum antiferromagnetic chains and lagrangina expression
一维量子反铁磁链格点自旋对易关系与广义拉氏表示 |
| 3. | In the first chapter of the article we introduce the bogoliubov - valatin transformation theory based upon the xxx antiferromagnetic model . in the second chapter , a new algebraic diagonalization method is presented
第二章介绍一种新的代数对角化方法的理论，这种方法可以将具有半单李代数结构的哈密顿量对角化。 |
| 4. | For all doping concentrations , the coupling between cr and the nearest neighbor n is found to be antiferromagnetic , and the cr 3d states hybridize strongly with n 2p states , which are in agreement with the band calculations
对于不同的掺杂浓度, cr原子与最近邻n原子之间均为反铁磁偶合, cr原子的3d电子与n原子的2p电子之间有很强的杂化,这和晶体的能带计算方法得到的结果一致。 |
| 5. | By means of the measure of entanglement called " concurrence " , we study the entanglement in heisenberg a single molecular magnets dimer v + with a strong magnetic field and find that thermal entanglement exits for both ferromagnetic ( fm ) and antiferromagnetic ( afm ) cases . in fm case entanglement vanishes for anisotropic parameter value = 0 , while in afm case , entanglement exits in the whole region of anisotropic parameter 0 < < 1 . an interesting conclusion is that the critical temperature is independent of the magnetic field
应用纠缠的一种测量“ concurrence ” ，对自旋二聚物v ~ ( 4 + )在外加强磁场情况下的热纠缠进行了研究，发现对于铁磁和反铁磁两种情况，热纠缠都存在；铁磁情况下，在各向异性常数等于零的时候纠缠消失，而对于反铁磁在整个各向异性常数变化范围内纠缠都存在，有意思的是我们发现临界温度独立于磁场b ，我们也研究了纠缠度随各向异性常数、磁场和温度的变化。 |
| 6. | The magnetic ground state of lafe _ ( 11 . 4 ) al _ ( 1 . 6 ) cx compound changes from antiferromagnetic to ferromagnetic for x > 0 . 06 and the curie temperature increased monotonously with the increase of carbon content . a large magnetic entropy change was obtained near the phase transition temperature and the refrigerant capacity is good
当碳含量高于0 . 06时,化合物的基态由反铁磁变为铁磁且居里温度随c含量的增加向高温区移动,在各自相变温度附近保持较大磁熵变,具有良好的磁制冷能力。 |
| 7. | By using the new method , the eigenstate of xxz antiferromagnetic model is solved , which is revealed to be 5 ? l , l ) coherent state . in the third chapter , we discussed the relation between the bogoliubov - valatin transformation and the algebraic method based upon the bcs model hamiltonian at first . then , we diagonalized the ssh model hamiltonian for the first time by using the algebraic diagonalization method
第三章我们首先使用bogoliubov - valatin变换对角化和新的代数对角化两种方法，将bcs模型的哈密顿量对角化，并对两种对角化方法作了比较、讨论；其后，本文首次给出了代数对角化方法在ssh模型中的应用，并且其结果也与bv变换法的作了同上面bcs模型类似的讨论。 |
| 8. | An anomalies in the dielectric constants and loss tangent have been observed experimentally in the ferroelectromagnet near the antiferromagnetic transition temperature , indicative of a coupling between the ferroelectric and magnetic ordering , but the nature of the mechanism of magnetoelectric coupling and the form of interaction is still an important and debated issue
而另一类是铁电磁体，它除了具有一般磁电体的性质外，还由于固有的本征磁有序和铁电有序的耦合使之存在自发的磁电效应。实验上已经发现了由于自发的磁电耦合导致的介电异常和损失正切。 |
