TETRACRITICAL POINTS IN MIXED MAGNETIC CRYSTALS
TETRACRITICAL POINTS IN MIXED MAGNETIC CRYSTALS
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DOI：
10.1103/physrevlett.34.590
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发表时间：
1975-01-01
影响因子：
8.6
通讯作者：
AHARONY, A
中科院分区：
文献类型：
--
作者：
AHARONY, A
最近发展的重整化群技术被用来研究淬灭混合磁性晶体的四临界（或双临界）点（例如，A p B 1− p，其中A和B具有铁磁和反铁磁相变）。四临界（双临界）指数可能由它们的ε展开式的n= 0值给出。特别是，描述四临界点附近p-T相图形状的交叉指数正好等于1。这解释了各种实验。
Recently developed renormalization-group techniques are used to study the tetracritical (or bicritical) point of quenched mixed magnetic crystals (eg, A p B 1− p, where A and B have ferromagnetic and antiferromagnetic phase transitions). The tetracritical (bicritical) exponents are possibly given by the n= 0 value of their ε expansions. In particular, the crossover exponent ϕ, describing the shape of the p− T phase diagram near the tetracritical point, is exactly equal to 1. This explains various experiments.