拓扑磁体ErMn6Sn6的临界行为和磁相图

IF 5.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Research Bulletin Pub Date : 2025-05-01 Epub Date: 2025-01-14 DOI:10.1016/j.materresbull.2025.113298

Xiaojun Yang, Junxiao Pan, Shijiang Liu, Mao Yang

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引用次数: 0

摘要

全面研究了kagome磁体ErMn6Sn6的磁相图和磁临界行为。H//ab （H//c）的Rhodes-Wolfarth比（RWR）为2.17(2.27)，表明其具有流动磁性。Arrott图显示了一阶场诱导的反铁磁-铁磁转变和二阶温度诱导的顺磁-铁磁转变。得到的临界指数β = 0.480(5), Tc = 354.8(1) K, γ = 1.379(8), Tc = 355.2(1) K, δ = 3.87(2), Tc = 355 K，符合Widom关系和标度假设，表明所得值具有自一致性和准确性。在这项研究中确定的指数表明三维临界行为和复杂的磁相互作用，随着距离的衰减为J(r) ~ r−4.93。详尽的H - T相图包括顺磁性，反铁磁性，铁磁性和铁磁性的状态，并提出了探索磁结构。

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Critical behavior and magnetic phase diagram of a topological kagome magnet ErMn6Sn6

The magnetic phase diagram as well as the magnetic critical behavior of a kagome magnet ErMn

_{6}

_{6}

is comprehensively studied. The Rhodes-Wolfarth ratio (RWR) is generated to be 2.17 (2.27) for

H / / a b

(

H / / c

), demonstrating an itinerant magnetism. The Arrott plots suggest a first-order field-induced antiferromagnetic-ferromagnetic transition and a second-order temperature-induced paramagnetic-ferromagnetic magnetic transition. The obtained critical exponents

β

= 0.480(5) with

T_{c}

= 354.8(1) K,

γ

= 1.379(8) with

T_{c}

= 355.2(1) K, and

δ

= 3.87(2) at

T_{c}

= 355 K, which well obey the Widom relation and the scaling hypothesis, indicating self-consistency and accuracy of the yielded values. The exponents determined in this study suggest a three-dimensional critical behavior and a complex magnetic interaction which decays with distance as

J (r) \sim r^{- 4.93}

. An exhaustive

H - T

phase graph including paramagnetic, antiferromagnetic, ferromagnetic, and ferrimagnetic states is suggested with an exploration of the magnetic structures.

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.