{"title":"La1 - xYxMn2Si2 系统中相变的量热研究","authors":"L. A. Stashkova, E. G. Gerasimov, N. V. Mushnikov","doi":"10.1134/s0031918x23602792","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Differential scanning calorimetry (DSC) is used to determine the magnetic phase transformation temperatures of the La<sub>1 – <i>x</i></sub>Y<sub><i>x</i></sub>Mn<sub>2</sub>Si<sub>2</sub> (<i>x</i> = 0–1) alloys. For the compositions with <i>х</i> from 0 to 0.3, the temperature dependences of DSC signal exhibit λ-like endothermic effects observed near 300 K, which are related to the magnetic phase transition from the ferromagnetic to layered antiferromagnetic structure, and weak anomalies, which are observed in a temperature range of from 458 K for the composition with <i>х</i> = 0 to 323 К for the composition with <i>х</i> = 0.3 upon disordering of the layered antiferromagnetic structure. A clear endothermic peak corresponding to the disordering of interplane antiferromagnetic layered structure was found for the YMn<sub>2</sub>Si<sub>2</sub>. The data obtained are used to construct the magnetic phase diagram of the La<sub>1 – <i>x</i></sub>Y<sub><i>x</i></sub>Mn<sub>2</sub>Si<sub>2</sub> system in a temperature range of 270–600 К. The differential scanning calorimetry is shown can be successfully used for the determination of temperatures of various magnetic phase transformations in rare-earth intermetallic compounds.</p>","PeriodicalId":20180,"journal":{"name":"Physics of Metals and Metallography","volume":"49 1","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Calorimetric Studies of Phase Transformations in the La1 – xYxMn2Si2 System\",\"authors\":\"L. A. Stashkova, E. G. Gerasimov, N. V. Mushnikov\",\"doi\":\"10.1134/s0031918x23602792\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3><p>Differential scanning calorimetry (DSC) is used to determine the magnetic phase transformation temperatures of the La<sub>1 – <i>x</i></sub>Y<sub><i>x</i></sub>Mn<sub>2</sub>Si<sub>2</sub> (<i>x</i> = 0–1) alloys. For the compositions with <i>х</i> from 0 to 0.3, the temperature dependences of DSC signal exhibit λ-like endothermic effects observed near 300 K, which are related to the magnetic phase transition from the ferromagnetic to layered antiferromagnetic structure, and weak anomalies, which are observed in a temperature range of from 458 K for the composition with <i>х</i> = 0 to 323 К for the composition with <i>х</i> = 0.3 upon disordering of the layered antiferromagnetic structure. A clear endothermic peak corresponding to the disordering of interplane antiferromagnetic layered structure was found for the YMn<sub>2</sub>Si<sub>2</sub>. The data obtained are used to construct the magnetic phase diagram of the La<sub>1 – <i>x</i></sub>Y<sub><i>x</i></sub>Mn<sub>2</sub>Si<sub>2</sub> system in a temperature range of 270–600 К. The differential scanning calorimetry is shown can be successfully used for the determination of temperatures of various magnetic phase transformations in rare-earth intermetallic compounds.</p>\",\"PeriodicalId\":20180,\"journal\":{\"name\":\"Physics of Metals and Metallography\",\"volume\":\"49 1\",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physics of Metals and Metallography\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1134/s0031918x23602792\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics of Metals and Metallography","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1134/s0031918x23602792","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
摘要
摘要 差示扫描量热法（DSC）用于测定 La1 - xYxMn2Si2（x = 0-1）合金的磁性相变温度。对于 х 为 0 至 0.3 的成分，DSC 信号的温度依赖性在 300 K 附近观察到类似于 λ 的内热效应，这与从铁磁结构到层状反铁磁结构的磁性相变有关；在层状反铁磁结构发生无序化时，在 х = 0 的成分的 458 K 至 х = 0.3 的成分的 323 К 的温度范围内观察到微弱的异常。在 YMn2Si2 中发现了一个与平面间反铁磁层状结构的无序化相对应的明显的内热峰。获得的数据用于构建 La1 - xYxMn2Si2 系统在 270-600 К 温度范围内的磁相图。差示扫描量热法可成功用于测定稀土金属间化合物中各种磁性相变的温度。
Calorimetric Studies of Phase Transformations in the La1 – xYxMn2Si2 System
Abstract
Differential scanning calorimetry (DSC) is used to determine the magnetic phase transformation temperatures of the La1 – xYxMn2Si2 (x = 0–1) alloys. For the compositions with х from 0 to 0.3, the temperature dependences of DSC signal exhibit λ-like endothermic effects observed near 300 K, which are related to the magnetic phase transition from the ferromagnetic to layered antiferromagnetic structure, and weak anomalies, which are observed in a temperature range of from 458 K for the composition with х = 0 to 323 К for the composition with х = 0.3 upon disordering of the layered antiferromagnetic structure. A clear endothermic peak corresponding to the disordering of interplane antiferromagnetic layered structure was found for the YMn2Si2. The data obtained are used to construct the magnetic phase diagram of the La1 – xYxMn2Si2 system in a temperature range of 270–600 К. The differential scanning calorimetry is shown can be successfully used for the determination of temperatures of various magnetic phase transformations in rare-earth intermetallic compounds.
期刊介绍：
The Physics of Metals and Metallography (Fizika metallov i metallovedenie) was founded in 1955 by the USSR Academy of Sciences. Its scientific profile involves the theory of metals and metal alloys, their electrical and magnetic properties, as well as their structure, phase transformations, and principal mechanical properties. The journal also publishes scientific reviews and papers written by experts involved in fundamental, application, and technological studies. The annual volume of publications amounts to some 250 papers submitted from 100 leading national scientific institutions.
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