Since, the entanglement occurs mainly in anti-ferromagnetic materials as their spins are aligned in random way. Kindly, let me know how to find out in general a material has the same nature or not? Giving references would be more helpful.
Dear Raja
The response to your question is here:
Magnetic Transition to Antiferromagnetic Phase in Gadolinium Substituted Topological Insulator Bi2Te3
There are many interests to achieve long-range magnetic order in topological insulators of Bi2Se3 or Bi2Te3 by doping magnetic transition metals such as Fe and Mn. The transition metals act as not only magnetic dopants but also electric dopants because they are usually divalent. However, if the doping elements are rare-earth metals such as Gd, which are trivalent, only magnetic moments can be introduced. We fabricated single crystals of Bi2-xGdxTe3 (0≤ × ≤ 0.2), in which we observed magnetic phase change from paramagnetic (PM) to antiferromagnetic (AFM) phase by increasing x. This PMto-AFM phase transition agrees with the density functional theory calculations showing a weak and short-ranged Gd-Gd AFM coupling via the intervening Te ions. The critical point corresponding to the magnetic phase transition is x= 0.09, where large linear magnetoresistance and highly anisotropic Shubnikov-de Haas oscillations are observed. These results are discussed with two-dimensional properties of topological surface state electrons. The spin-momentum locked surface states of three-d
read more in this paper:
Scientific Reports | 5:10309 | DOI: 10.1038/srep10309
Jinsu Kim, Kyujoon Lee , Toshiro Takabatake , Hanchul Kim , Miyoung Kim and Myung-Hwa Jung
Dear Ouerdane ,
Thank you for your response. From your response I understood that the pure form of this material is not an AFM. Is this ryt? SInce, we are dealing only with the pure ones not the dopants.
Thanking you once again.
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