Dong-Xin Fan , Zheng-Xu Zhu , Zhi-Qi Wu , Feng-Guang Liu , Shi-Heng Liang , Zheng-Cai Xia , Rui-Long Wang
{"title":"在 La0.3-xLuxPr0.7CrO3 中掺入 Lu3+ 引发的磁化和交换偏置场的符号反转","authors":"Dong-Xin Fan , Zheng-Xu Zhu , Zhi-Qi Wu , Feng-Guang Liu , Shi-Heng Liang , Zheng-Cai Xia , Rui-Long Wang","doi":"10.1016/j.scriptamat.2024.116259","DOIUrl":null,"url":null,"abstract":"<div><p>We have investigated the phenomenon of negative magnetization and exchange bias effect in polycrystalline La<sub>0.3-x</sub>Lu<sub>x</sub>Pr<sub>0.7</sub>CrO<sub>3</sub> (0 ≤ <em>x</em> ≤ 0.3). La<sub>0.3</sub>Pr<sub>0.7</sub>CrO<sub>3</sub> exhibits negative magnetization and positive exchange bias field below compensation temperature under an applied field of 1 kOe in field cooling mode due to the antiferromagnetic coupling between Pr<sup>3+</sup> moment and canted Cr<sup>3+</sup> moment with Cr<sup>3+</sup> moment parallel to the direction of applied magnetic field. However, the phenomenon of negative magnetization disappears accompanied by a sign reversal of exchange bias field from positive to negative at low temperature for <em>x</em> ≥ 0.2 samples, which can be ascribed to the dominant role of <em>G</em><sub>z</sub><em>F</em><sub>x</sub> order induced by Lu<sup>3+</sup> doping and consequent spin rotation of Pr<sup>3+</sup>-Cr<sup>3+</sup> coupling. Though the negative magnetization can still be observed for the <em>x</em> = 0.1 sample, negative exchange bias field occurs as the growth of <em>G</em><sub>z</sub><em>F</em><sub>x</sub> ordering domain during the initial magnetization process, evidenced by the disappearance of negative magnetization and spin rotation of Pr<sup>3+</sup>-Cr<sup>3+</sup> coupling after high magnetic field pulse.</p></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Sign reversals of magnetization and exchange bias field induced by Lu3+ doping in La0.3-xLuxPr0.7CrO3\",\"authors\":\"Dong-Xin Fan , Zheng-Xu Zhu , Zhi-Qi Wu , Feng-Guang Liu , Shi-Heng Liang , Zheng-Cai Xia , Rui-Long Wang\",\"doi\":\"10.1016/j.scriptamat.2024.116259\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We have investigated the phenomenon of negative magnetization and exchange bias effect in polycrystalline La<sub>0.3-x</sub>Lu<sub>x</sub>Pr<sub>0.7</sub>CrO<sub>3</sub> (0 ≤ <em>x</em> ≤ 0.3). La<sub>0.3</sub>Pr<sub>0.7</sub>CrO<sub>3</sub> exhibits negative magnetization and positive exchange bias field below compensation temperature under an applied field of 1 kOe in field cooling mode due to the antiferromagnetic coupling between Pr<sup>3+</sup> moment and canted Cr<sup>3+</sup> moment with Cr<sup>3+</sup> moment parallel to the direction of applied magnetic field. However, the phenomenon of negative magnetization disappears accompanied by a sign reversal of exchange bias field from positive to negative at low temperature for <em>x</em> ≥ 0.2 samples, which can be ascribed to the dominant role of <em>G</em><sub>z</sub><em>F</em><sub>x</sub> order induced by Lu<sup>3+</sup> doping and consequent spin rotation of Pr<sup>3+</sup>-Cr<sup>3+</sup> coupling. Though the negative magnetization can still be observed for the <em>x</em> = 0.1 sample, negative exchange bias field occurs as the growth of <em>G</em><sub>z</sub><em>F</em><sub>x</sub> ordering domain during the initial magnetization process, evidenced by the disappearance of negative magnetization and spin rotation of Pr<sup>3+</sup>-Cr<sup>3+</sup> coupling after high magnetic field pulse.</p></div>\",\"PeriodicalId\":423,\"journal\":{\"name\":\"Scripta Materialia\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Scripta Materialia\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S135964622400294X\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S135964622400294X","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Sign reversals of magnetization and exchange bias field induced by Lu3+ doping in La0.3-xLuxPr0.7CrO3
We have investigated the phenomenon of negative magnetization and exchange bias effect in polycrystalline La0.3-xLuxPr0.7CrO3 (0 ≤ x ≤ 0.3). La0.3Pr0.7CrO3 exhibits negative magnetization and positive exchange bias field below compensation temperature under an applied field of 1 kOe in field cooling mode due to the antiferromagnetic coupling between Pr3+ moment and canted Cr3+ moment with Cr3+ moment parallel to the direction of applied magnetic field. However, the phenomenon of negative magnetization disappears accompanied by a sign reversal of exchange bias field from positive to negative at low temperature for x ≥ 0.2 samples, which can be ascribed to the dominant role of GzFx order induced by Lu3+ doping and consequent spin rotation of Pr3+-Cr3+ coupling. Though the negative magnetization can still be observed for the x = 0.1 sample, negative exchange bias field occurs as the growth of GzFx ordering domain during the initial magnetization process, evidenced by the disappearance of negative magnetization and spin rotation of Pr3+-Cr3+ coupling after high magnetic field pulse.
期刊介绍:
Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.