Emergent Griffiths-phase-like behavior in the ball-milled nanocrystalline Dy4RhAl and its implication

被引：0

作者：

Iyer, Kartik K. ^{[1
]}

Maiti, Kalobaran ^{[1
]}

Rayaprol, S. ^{[2
]}

Chalke, B. A. ^{[1
]}

Sampathkumaran, E. V. ^{[3
]}

机构：

[1] Tata Inst Fundamental Res, Homi Bhabha Rd, Colaba 400005, Mumbai, India

[2] UGC DAE Consortium Sci Res, Mumbai Ctr, BARC Campus, Trombay 400085, Mumbai, India

[3] TIFR, Homi Bhabha Ctr Sci Educ, VN Purav Marg, Mankhurd 400088, Mumbai, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 597卷

关键词：

Nanocrystals; Magnetism; Griffiths phase; HO;

D O I：

10.1016/j.jmmm.2024.172018

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the results of dc susceptibility and heat capacity measurements on the (ball-milled) nanocrystalline rare-earth (R) ternary compound, crystallizing in Gd4RhIn-type, cubic Dy4RhAl compound (space group F 43 m, No. 216, cF96). The bulk form of this compound has been known to undergo antiferromagnetic ordering at (TN = ) 18 K with concomitant cluster spin-glass anomalies. The present studies on the nano-form obtained by ballmilling reveal that this antiferromagnetic ordering is suppressed with the reduction of particle size with no feature attributable to a well-defined long-range magnetic ordering down to 1.8 K, but showing an inhomogeneous magnetism below 10 K. The point being stressed is that the results show the dominance of a feature around 30 K in the magnetic susceptibility data - well above TN of the bulk form - mimicking Griffiths phase. We infer that surface magnetism dominates before long-range magnetic ordering occurs in this material.

引用

页数：5

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