| 包钴铁氧体型γ-Fe2O3磁粉穆斯堡尔效应的研究 |
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| 引用本文： | 李士,章佩群,计桂泉,罗河烈,孙克.包钴铁氧体型γ-Fe2O3磁粉穆斯堡尔效应的研究[J].物理学报,1981,30(1):120-123. |
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| 作者姓名： | 李士 章佩群 计桂泉 罗河烈 孙克 |
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| 作者单位： | (1)中国科学院高能物理研究所; (2)中国科学院物理研究所 |
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| 摘 要： | 包钴铁氧体型,γ-Fe2O3磁粉(简记为CoFe-γ-Fe2O3)是针状γ-Fe2O3磁粉与Co++和Fe++溶液起反应,在每个针状颗粒上包覆了一层钴铁氧体固溶体。经此种方法处理后的γ-Fe2O3磁粉的矫顽力及其它磁特性有较大的提高。如矫顽力由原来415Oe增加到715Oe;剩磁和矫顽力随时间及温度变化小等。我们利用穆斯堡尔效应并配合其它研究手段进行了研究,认为:CoFe-γ-Fe2O3磁粉矫顽力的提高,主要是由于γ-Fe2O3磁粉表面包覆了一层钴铁氧体固溶体,γ-Fe2O3与钴铁氧体固溶体之间发生磁耦合作用之故。
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| 收稿时间： | 5/7/1980 12:00:00 AM |
STUDY ON THE M?SSBAUER EFFECT OF γ-Fe2O3 POWDER WITH CoxFe3-xO4-DOPED COATING |
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| LI SHI,ZANG PEI-QUN,JI GUI-QUAN,LUO HE-LIE and SUN KE.STUDY ON THE M?SSBAUER EFFECT OF γ-Fe2O3 POWDER WITH CoxFe3-xO4-DOPED COATING[J].Acta Physica Sinica,1981,30(1):120-123. |
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| Authors: | LI SHI ZANG PEI-QUN JI GUI-QUAN LUO HE-LIE and SUN KE |
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| Abstract: | The γ-Fe2O3 powder with CoxFe3-xO4-doped coating was obtained by reaction of the γ-Fe2O3 powder in the solutions containing Co++ and Fe++ ions. It was found that this epitaxial CoxFe3-xO4 coating raised the coercivity of the γ-Fe2O3 from 420 (Oe) to 715 (Oe).The epitaxial CoxFe3-xO4 coating was isvestigated by means of M?ssbauer Effect of 57Fe. The M?ssbauer Spectrum indicates that the surface of γ-Fe2O3 was doped with CoxFe3-xO4 solid solution, and a static magnetic interaction takes place between the γ-Fe2O3 matrix and CoxFe3-xO4 solid solution.
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