Antiferromagnetic Ordering in the Spin Ladder Compound; Sr14-xCaxCu24O41
Antiferromagnetic Ordering in the Spin Ladder Compound; Sr14-xCaxCu24O41
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自旋梯化合物中的反铁磁有序性；
DOI：
10.1143/jpsj.70.2419
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发表时间：
2001
影响因子：
1.7
通讯作者：
T. Sakakibara
中科院分区：
文献类型：
--
作者：
T. Nagata;H. Fujino;Kaname Satoh;Naoyuki Yamamori;J. Akimitsu;S. Katano;M. Nishi;K. Kakurai;M. Hiroi;M. Sera;N. Kobayashi;K. Tenya;H. Amitsuka;T. Takigawa;Hironobu Inago;T. Sakakibara
我们报告的比热，磁化率和中子散射测量的Sr 14- x Ca x Cu 24 O 41的单晶。Sr 2.5Ca11.5Cu2 4 O 4 1（x =11.5）在T N = 2.3K时发生相变，T N随x的降低而降低.磁化率测量x =9，10和11.5表明，这种相变是由于反铁磁有序。在x =10和11.5的中子散射实验中，我们观察到几个布拉格峰，对应于比热和磁化率测量中证实的反铁磁有序。一个可能的磁性结构上的链和梯形网站已被提出。在该体系中，由Ca取代Sr引起的单重态和反铁磁有序在常压下共存，溶解的空穴对在高压下移动，导致超导电性的发生。
We report specific heat, magnetic susceptibility and neutron scattering measurements on the single crystals of Sr 14- x Ca x Cu 24 O 41 . The specific heat data of Sr 2.5 Ca 11.5 Cu 24 O 41 ( x =11.5) showed a sharp phase transition at T N ≈2.3 K, and T N was decreased with decreasing the Ca content x . Susceptibility measurements for x =9, 10 and 11.5 revealed that this phase transition is due to antiferromagnetic ordering. In the neutron scattering experiments for x =10 and 11.5, we observed several Bragg peaks, corresponding to the antiferromagnetic ordering confirmed in the specific heat and susceptibility measurements. A possible magnetic structure on the chain and ladder sites has been proposed. In this system, the singlet state and antiferromagnetic ordering induced by Ca substitution for Sr coexist at ambient pressure and the dissolved hole pairs move under high pressure, leading to the occurrence of superconductivity.
影响因子：
8.6
作者：
R. Eccleston;M. Uehara;J. Akimitsu;H. Eisaki;N. Motoyama;S. U. .. I. Facility;Clrc Rutherford Appleton Laboratory;D. Physics;A. University;Department of Superconductivity;T. U. O. Tokyo
通讯作者：
R. Eccleston;M. Uehara;J. Akimitsu;H. Eisaki;N. Motoyama;S. U. .. I. Facility;Clrc Rutherford Appleton Laboratory;D. Physics;A. University;Department of Superconductivity;T. U. O. Tokyo