YBaCo4O7 + x (x = 0, 0.1) System: From Antiferromagnetism to Ferromagnetism

IF 1 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
Z. A. Kazei, M. M. Markina, V. V. Snegirev, M. S. Stolyarenko
{"title":"YBaCo4O7 + x (x = 0, 0.1) System: From Antiferromagnetism to Ferromagnetism","authors":"Z. A. Kazei,&nbsp;M. M. Markina,&nbsp;V. V. Snegirev,&nbsp;M. S. Stolyarenko","doi":"10.1134/S1063776123070038","DOIUrl":null,"url":null,"abstract":"<p>The modification of magnetic and elastic properties of YBaCo<sub>4</sub>O<sub>7 +</sub> <sub><i>x</i></sub> (<i>x</i> = 0, 0.1) cobaltites at a slight controlled deviation from stoichiometry (<i>x</i>) has been investigated. The magnetic properties of stoichiometric YBaCo<sub>4</sub>O<sub>7</sub> demonstrate nontrivial behavior, which is inconsistent with the generally accepted notion of phase transitions with long-range magnetic order. Only magnetic moment Δ<i>M</i> = <i>M</i><sub><i>FC</i></sub> – <i>M</i><sub><i>ZFC</i></sub> induced by an external magnetic field (an analog of thermoremanent magnetization) exhibits anomalies at magnetic phase transition temperatures <i>T</i><sub><i>N</i>1</sub> and <i>T</i><sub><i>N</i>2</sub> that coincide with those of Young’s modulus anomalies, whereas in the magnetic susceptibility curves taken in the FC and ZFC modes, phase transitions are not discerned. At a small off-stoichiometry (<i>x</i> = 0.1), induced moment Δ<i>M</i> rises by an order of magnitude and a residual ferromagnetic moment of about 10<sup>–3</sup> μ<sub>B</sub> arises in the magnetization curves. Two scenarios of the cobalt subsystem magnetic behavior with increasing part of cobalt ions Co<sup>3+</sup> have been discussed. It has been found that when YBaCo<sub>4</sub>O<sub>7 +</sub> <sub><i>x</i></sub> cobaltites deviate from stoichiometry, the evolution of their magnetic properties is similar to that observed at the transition from Y-based to Ca-based cobaltite.</p>","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"137 1","pages":"89 - 94"},"PeriodicalIF":1.0000,"publicationDate":"2023-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Experimental and Theoretical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063776123070038","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

The modification of magnetic and elastic properties of YBaCo4O7 + x (x = 0, 0.1) cobaltites at a slight controlled deviation from stoichiometry (x) has been investigated. The magnetic properties of stoichiometric YBaCo4O7 demonstrate nontrivial behavior, which is inconsistent with the generally accepted notion of phase transitions with long-range magnetic order. Only magnetic moment ΔM = MFCMZFC induced by an external magnetic field (an analog of thermoremanent magnetization) exhibits anomalies at magnetic phase transition temperatures TN1 and TN2 that coincide with those of Young’s modulus anomalies, whereas in the magnetic susceptibility curves taken in the FC and ZFC modes, phase transitions are not discerned. At a small off-stoichiometry (x = 0.1), induced moment ΔM rises by an order of magnitude and a residual ferromagnetic moment of about 10–3 μB arises in the magnetization curves. Two scenarios of the cobalt subsystem magnetic behavior with increasing part of cobalt ions Co3+ have been discussed. It has been found that when YBaCo4O7 + x cobaltites deviate from stoichiometry, the evolution of their magnetic properties is similar to that observed at the transition from Y-based to Ca-based cobaltite.

Abstract Image

YBaCo4O7 + x (x = 0,0.1)体系:从反铁磁性到铁磁性
研究了YBaCo4O7 + x (x = 0,0.1)钴酸盐的磁性和弹性在与化学计量量(x)的轻微可控偏差下的改性。化学计量YBaCo4O7的磁性表现出非平凡的行为,这与普遍接受的具有长程磁序的相变概念不一致。在磁相变温度TN1和TN2下,只有由外磁场(类似于热磁化)引起的磁矩ΔM = MFC - MZFC表现出与杨氏模量异常相一致的异常,而在FC和ZFC模式下的磁化率曲线中,没有发现相变。当偏离化学计量量较小(x = 0.1)时,感应矩ΔM上升了一个数量级,磁化曲线上出现了约10-3 μB的残余铁磁矩。讨论了随着钴离子Co3+含量的增加,钴子系统磁性行为的两种情况。研究发现,当YBaCo4O7 + x钴酸盐偏离化学计量时,其磁性能的演变与基钴酸盐向ca基钴酸盐转变时相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
1.90
自引率
9.10%
发文量
130
审稿时长
3-6 weeks
期刊介绍: Journal of Experimental and Theoretical Physics is one of the most influential physics research journals. Originally based on Russia, this international journal now welcomes manuscripts from all countries in the English or Russian language. It publishes original papers on fundamental theoretical and experimental research in all fields of physics: from solids and liquids to elementary particles and astrophysics.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信