Magnetic phase diagram and first-principles study of Pb 3 TeCo 3 V 2 O 14
Magnetic phase diagram and first-principles study of Pb 3 TeCo 3 V 2 O 14
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DOI：
10.1103/physrevb.89.104409
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发表时间：
2013-12
影响因子：
3.7
通讯作者：
M. Markina;B. Mill;E. Zvereva;A. Ushakov;S. Streltsov;A. Vasiliev
中科院分区：
文献类型：
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作者：
M. Markina;B. Mill;E. Zvereva;A. Ushakov;S. Streltsov;A. Vasiliev
Pb3TeCo3V2O14的反铁磁有序发生在T* ~ 10.5 K形成的短程相关体系中，并在TN1 = 8.9 K和TN2 = 6.3 K处相继发生二级相变。外加磁场迅速破坏T < TN2处的磁性结构，并影响TN2 < T < TN1处的磁性顺序，导致Pb3TeCo3V2O14的复杂磁相图（由磁化强度和比热测量得出）。第一原理计算表明，与层状晶体结构不同，Pb3TeCo3V2O14的磁性子系统是准一维的，由弱耦合的三角形管组成，极不寻常。
An antiferromagnetic ordering in Pb3TeCo3V2O14 takes place through formation of short range correlation regime with T* ~ 10.5 K and succession of second order phase transition at TN1 = 8.9 K and first order phase transition at TN2 = 6.3 K. An external magnetic field rapidly destroys magnetic structure at T < TN2 and influences the magnetic order at TN2 < T < TN1 resulting in complex magnetic phase diagram of Pb3TeCo3V2O14 as derived from magnetization and specific heat measurements. The first principles calculations indicate that in variance with layered crystal structure the magnetic subsystem of Pb3TeCo3V2O14 is quasi-one-dimensional and highly unusual consisting of weakly coupled triangular tubes.