Critical Behavior Near the Paramagnetic to Ferromagnetic Phase Transition Temperature in Sr1.5Nd0.5MnO4 Compound

被引：18
作者：
Zarai, E. [1 ]
Issaoui, F. [1 ,2 ]
Tozri, A. [1 ]
Husseinc, M. [3 ]
Dhahri, E. [1 ]
机构：
[1] Univ Sfax, Fac Sci, Appl Phys Lab, BP 1171, Sfax 3000, Tunisia
[2] Univ Kairouan, Fac Sci & Tech Sidi Bouzid, Campus Cite Agr 9100, Kairouan, Tunisia
[3] King Abdulaziz Univ, Dept Phys, Rabigh Coll Sci & Art, POB 34, Rabigh 21911, Saudi Arabia
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2016年 / 29卷 / 04期
关键词：
K2NiF4-type structure; Critical behavior; Critical exponents; MAGNETIC-PROPERTIES; SPIN-GLASS; SR;
D O I：
10.1007/s10948-015-3367-0
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetic properties and the critical behavior in Sr1.5Nd0.5MnO4 have been investigated by magnetization measurements. The magnetic data indicate that the compound exhibits a second-order phase transition. The estimated critical exponents derived from the magnetic data using various techniques such as modified Arrott plot, Kouvel-Fisher method, and critical magnetization isotherms M (T (C), H). The critical exponent values for this compound was found to match well with those predicted for the mean-field model (delta = 2.212 +/- 0.124, gamma = 0.975 +/- 0.018, and beta = 0.502 +/- 0.012) at T (C) = 228.59 +/- 0.17. The critical exponent gamma is slightly inferior than predicted from the mean-field model. Such a difference may be due, within the context of the quenched disorder and essentially the presence of the Griffiths phase. The temperature variation in the effective exponent (gamma (eff)) is similar to those for disordered ferromagnets.
引用
收藏
页码：869 / 877
页数：9
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