用中子粉末衍射研究了R2Ni2In (R = Tb和Tm)的磁弹性效应

IF 1.3 4区材料科学 Q3 CRYSTALLOGRAPHY

Phase Transitions Pub Date : 2023-02-01 DOI:10.1080/01411594.2023.2188214

S. Baran, A. Hoser, B. Penc, A. Szytuła

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引用次数: 0

摘要

R2Ni2In（R）中的磁弹性效应 = Tb，Tm），与Néel温度TN等于40K（R = Tb）或4.8 K（R = Tm）进行了中子粉末衍射研究。Rietveld精化揭示了在室温下报道的正交晶体结构在低温下是稳定的，包括磁有序状态。基于衍射数据，已经确定了晶格参数a、b和c的热演化以及晶胞体积V。晶格参数和晶胞体积在各自的Néel温度附近都显示出明显的跳跃，表明存在磁弹性效应。报道了晶格应变Δa、Δb、Δc的值以及与反铁-顺磁相变相关的晶胞体积ΔV的变化。

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Magnetoelastic effect in R2Ni2In (R = Tb and Tm) investigated by neutron powder diffraction

ABSTRACT Magnetoelastic effect in R2Ni2In (R = Tb, Tm), associated with the antiferro- to paramagnetic phase transition at the Néel temperature TN equal to 40 K (R = Tb) or 4.8 K (R = Tm), has been investigated by neutron powder diffraction. Rietveld refinement reveals that the orthorhombic crystal structure, reported at room temperature, is stable down to low temperatures, including magnetically ordered state. Based on the diffraction data, thermal evolution of the lattice parameters a, b and c and the unit cell volume V have been determined. Both the lattice parameters as well as the unit cell volume show distinct jumps in the vicinity of the respective Néel temperatures, indicating presence of the magnetoelastic effect. The values of the lattice strains Δa, Δb, Δc and change of the unit cell volume ΔV, associated with the antiferro- to paramagnetic phase transition, are reported.

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来源期刊

Phase Transitions 物理-晶体学

CiteScore

3.00

自引率

6.20%

发文量

审稿时长

1.4 months

期刊介绍： Phase Transitions is the only journal devoted exclusively to this important subject. It provides a focus for papers on most aspects of phase transitions in condensed matter. Although emphasis is placed primarily on experimental work, theoretical papers are welcome if they have some bearing on experimental results. The areas of interest include: -structural phase transitions (ferroelectric, ferroelastic, multiferroic, order-disorder, Jahn-Teller, etc.) under a range of external parameters (temperature, pressure, strain, electric/magnetic fields, etc.) -geophysical phase transitions -metal-insulator phase transitions -superconducting and superfluid transitions -magnetic phase transitions -critical phenomena and physical properties at phase transitions -liquid crystals -technological applications of phase transitions -quantum phase transitions Phase Transitions publishes both research papers and invited articles devoted to special topics. Major review papers are particularly welcome. A further emphasis of the journal is the publication of a selected number of small workshops, which are at the forefront of their field.