R. M. Eremina, I. V. Yatsyk, Z. Y. Seidov, F. G. Vagizov, V. A. Shustov, A. G. Badelin, V. K. Karpasyuk, D. S. Abdinov, M. M. Tagiev, S. Kh. Estemirova, H.-A. Krug von Nidda
{"title":"La0.81Sr0.19Mn0.9Fe0.1−xZnxO3的磁性能(x = 0, x = 0.05)","authors":"R. M. Eremina, I. V. Yatsyk, Z. Y. Seidov, F. G. Vagizov, V. A. Shustov, A. G. Badelin, V. K. Karpasyuk, D. S. Abdinov, M. M. Tagiev, S. Kh. Estemirova, H.-A. Krug von Nidda","doi":"10.1007/s00723-022-01510-x","DOIUrl":null,"url":null,"abstract":"<div><p>Magnetic properties of polycrystalline La<sub>0.81</sub>Sr<sub>0.19</sub>Mn<sub>0.9</sub>Fe<sub>0.1−<i>x</i></sub>Zn<sub><i>x</i></sub>O<sub>3</sub> (<i>x</i> = 0, 0<i>.</i>05) have been investigated by means of electron spin resonance, magnetic susceptibility, and Mössbauer measurements. Both samples show a clear ferromagnetic transition. The Curie temperature <i>T</i><sub>C</sub> decreases on increasing Fe content (<i>x</i> = 0.05—<i>T</i><sub>C</sub> = 222 K; <i>x</i> = 0—<i>T</i><sub>C</sub> = 148 K). Mössbauer studies indicate that Fe in these compounds is in the trivalent high-spin state. The temperature evolution of the Mössbauer spectra at low temperatures (<i>T</i> < <i>T</i><sub>C</sub>) is typical for ferromagnetic clusters with a wide distribution in size and magnetic correlation length. The inverse susceptibility of all the samples deviates from the Curie–Weiss law above <i>T</i><sub>C</sub>, indicating the presence of fluctuations on approaching magnetic order. An anomalous downturn of the inverse susceptibility for <i>x</i> = 0<i>.</i>05 significantly above <i>T</i><sub>C</sub> and the concomitant observation of ferromagnetic resonance signals coexisting with the paramagnetic resonance up to approximately room temperature, is caused by a Griffiths-like behavior. This regime is characterized by the coexistence of ferromagnetic entities within the globally paramagnetic phase.</p></div>","PeriodicalId":469,"journal":{"name":"Applied Magnetic Resonance","volume":"54 4-5","pages":"449 - 461"},"PeriodicalIF":1.1000,"publicationDate":"2022-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00723-022-01510-x.pdf","citationCount":"0","resultStr":"{\"title\":\"Magnetic Properties of La0.81Sr0.19Mn0.9Fe0.1−xZnxO3 (x = 0, x = 0.05)\",\"authors\":\"R. M. Eremina, I. V. Yatsyk, Z. Y. Seidov, F. G. Vagizov, V. A. Shustov, A. G. Badelin, V. K. Karpasyuk, D. S. Abdinov, M. M. Tagiev, S. Kh. Estemirova, H.-A. Krug von Nidda\",\"doi\":\"10.1007/s00723-022-01510-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Magnetic properties of polycrystalline La<sub>0.81</sub>Sr<sub>0.19</sub>Mn<sub>0.9</sub>Fe<sub>0.1−<i>x</i></sub>Zn<sub><i>x</i></sub>O<sub>3</sub> (<i>x</i> = 0, 0<i>.</i>05) have been investigated by means of electron spin resonance, magnetic susceptibility, and Mössbauer measurements. Both samples show a clear ferromagnetic transition. The Curie temperature <i>T</i><sub>C</sub> decreases on increasing Fe content (<i>x</i> = 0.05—<i>T</i><sub>C</sub> = 222 K; <i>x</i> = 0—<i>T</i><sub>C</sub> = 148 K). Mössbauer studies indicate that Fe in these compounds is in the trivalent high-spin state. The temperature evolution of the Mössbauer spectra at low temperatures (<i>T</i> < <i>T</i><sub>C</sub>) is typical for ferromagnetic clusters with a wide distribution in size and magnetic correlation length. The inverse susceptibility of all the samples deviates from the Curie–Weiss law above <i>T</i><sub>C</sub>, indicating the presence of fluctuations on approaching magnetic order. An anomalous downturn of the inverse susceptibility for <i>x</i> = 0<i>.</i>05 significantly above <i>T</i><sub>C</sub> and the concomitant observation of ferromagnetic resonance signals coexisting with the paramagnetic resonance up to approximately room temperature, is caused by a Griffiths-like behavior. This regime is characterized by the coexistence of ferromagnetic entities within the globally paramagnetic phase.</p></div>\",\"PeriodicalId\":469,\"journal\":{\"name\":\"Applied Magnetic Resonance\",\"volume\":\"54 4-5\",\"pages\":\"449 - 461\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2022-11-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s00723-022-01510-x.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Magnetic Resonance\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00723-022-01510-x\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Magnetic Resonance","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s00723-022-01510-x","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
Magnetic Properties of La0.81Sr0.19Mn0.9Fe0.1−xZnxO3 (x = 0, x = 0.05)
Magnetic properties of polycrystalline La0.81Sr0.19Mn0.9Fe0.1−xZnxO3 (x = 0, 0.05) have been investigated by means of electron spin resonance, magnetic susceptibility, and Mössbauer measurements. Both samples show a clear ferromagnetic transition. The Curie temperature TC decreases on increasing Fe content (x = 0.05—TC = 222 K; x = 0—TC = 148 K). Mössbauer studies indicate that Fe in these compounds is in the trivalent high-spin state. The temperature evolution of the Mössbauer spectra at low temperatures (T < TC) is typical for ferromagnetic clusters with a wide distribution in size and magnetic correlation length. The inverse susceptibility of all the samples deviates from the Curie–Weiss law above TC, indicating the presence of fluctuations on approaching magnetic order. An anomalous downturn of the inverse susceptibility for x = 0.05 significantly above TC and the concomitant observation of ferromagnetic resonance signals coexisting with the paramagnetic resonance up to approximately room temperature, is caused by a Griffiths-like behavior. This regime is characterized by the coexistence of ferromagnetic entities within the globally paramagnetic phase.
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Applied Magnetic Resonance provides an international forum for the application of magnetic resonance in physics, chemistry, biology, medicine, geochemistry, ecology, engineering, and related fields.
The contents include articles with a strong emphasis on new applications, and on new experimental methods. Additional features include book reviews and Letters to the Editor.
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