{"title":"Sr0.7La0.3Fe11.75Co0.25O19 - CoFe2O4 复合体系中的磁相互作用:观察、证据和影响","authors":"S. Rout, Tupan Das, Anant Shukla, Manoranjan Kar","doi":"10.1088/1361-6463/ad626f","DOIUrl":null,"url":null,"abstract":"\n (100-x) Sr0.7La0.3Fe11.75Co0.25O19-(x) CoFe2O4 composites were synthesized by the one pot sol-gel auto-combustion method. The individual phase purity, morphology, and magnetic hysteresis loop of the composite magnet were analyzed by X-ray powder diffraction, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The apparent observation of room temperature hysteresis loop indicates the existence of interfacial exchange interaction. Nevertheless, saturation magnetization (Ms) follows the trend of Vegard’s law. The nature of magnetic interaction and its dependency on the amount of each phase were analyzed by employing the Thamm-Hesse plot. The critical size of the soft phase particle did not corroborate with the results of ∆M vs H plot. However, this synthesis method is found to be successful in obtaining single-step magnetization reversal in hard-soft composite magnets. The deviation from ideal non-interacting Stoner-Wohlfarth particles puts the single hard phase into the limelight. The (BH)max in the range of 1.07-0.98 MGOe has been obtained for the synthesized composite magnet.","PeriodicalId":507822,"journal":{"name":"Journal of Physics D: Applied Physics","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic interaction in Sr0.7La0.3Fe11.75Co0.25O19 - CoFe2O4 composite system: Observation, evidence, and influence\",\"authors\":\"S. Rout, Tupan Das, Anant Shukla, Manoranjan Kar\",\"doi\":\"10.1088/1361-6463/ad626f\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n (100-x) Sr0.7La0.3Fe11.75Co0.25O19-(x) CoFe2O4 composites were synthesized by the one pot sol-gel auto-combustion method. The individual phase purity, morphology, and magnetic hysteresis loop of the composite magnet were analyzed by X-ray powder diffraction, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The apparent observation of room temperature hysteresis loop indicates the existence of interfacial exchange interaction. Nevertheless, saturation magnetization (Ms) follows the trend of Vegard’s law. The nature of magnetic interaction and its dependency on the amount of each phase were analyzed by employing the Thamm-Hesse plot. The critical size of the soft phase particle did not corroborate with the results of ∆M vs H plot. However, this synthesis method is found to be successful in obtaining single-step magnetization reversal in hard-soft composite magnets. The deviation from ideal non-interacting Stoner-Wohlfarth particles puts the single hard phase into the limelight. The (BH)max in the range of 1.07-0.98 MGOe has been obtained for the synthesized composite magnet.\",\"PeriodicalId\":507822,\"journal\":{\"name\":\"Journal of Physics D: Applied Physics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Physics D: Applied Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1088/1361-6463/ad626f\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics D: Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/1361-6463/ad626f","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
采用一锅溶胶-凝胶自动燃烧法合成了 (100-x) Sr0.7La0.3Fe11.75Co0.25O19-(x) CoFe2O4 复合材料。分别采用 X 射线粉末衍射、场发射扫描电子显微镜和振动样品磁力计分析了复合磁体的单相纯度、形貌和磁滞回线。室温磁滞回线的明显观测结果表明存在界面交换相互作用。然而,饱和磁化(Ms)遵循维加定律的趋势。利用 Thamm-Hesse 图分析了磁性相互作用的性质及其与各相量的关系。软相颗粒的临界尺寸与 ∆M vs H 图的结果并不一致。不过,这种合成方法成功地在软硬复合磁体中获得了单步磁化反转。与理想的非相互作用斯通纳-沃尔法特粒子的偏差使单一硬磁相成为焦点。合成的复合磁体获得了 1.07-0.98 MGOe 范围内的(BH)最大值。
Magnetic interaction in Sr0.7La0.3Fe11.75Co0.25O19 - CoFe2O4 composite system: Observation, evidence, and influence
(100-x) Sr0.7La0.3Fe11.75Co0.25O19-(x) CoFe2O4 composites were synthesized by the one pot sol-gel auto-combustion method. The individual phase purity, morphology, and magnetic hysteresis loop of the composite magnet were analyzed by X-ray powder diffraction, field emission scanning electron microscopy, and vibrating sample magnetometer, respectively. The apparent observation of room temperature hysteresis loop indicates the existence of interfacial exchange interaction. Nevertheless, saturation magnetization (Ms) follows the trend of Vegard’s law. The nature of magnetic interaction and its dependency on the amount of each phase were analyzed by employing the Thamm-Hesse plot. The critical size of the soft phase particle did not corroborate with the results of ∆M vs H plot. However, this synthesis method is found to be successful in obtaining single-step magnetization reversal in hard-soft composite magnets. The deviation from ideal non-interacting Stoner-Wohlfarth particles puts the single hard phase into the limelight. The (BH)max in the range of 1.07-0.98 MGOe has been obtained for the synthesized composite magnet.