Magnetic properties of the Ce2Fe17−xMnx helical magnets up to high magnetic fields |
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Authors: | AG Kuchin NV Mushnikov MI Bartashevich O Prokhnenko VI Khrabrov TP Lapina |
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Institution: | 1. Institute of Metal Physics, 18 Kovalevskaya Street, 620041 Ekaterinburg, Russia;2. Institute of Physics and Applied Mathematics, Ural State University, 620083 Ekaterinburg, Russia;3. Hahn Meitner Institute, Glinieckerstrasse 100, 14109 Berlin, Germany |
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Abstract: | Magnetic properties of the Ce2Fe17−xMnx, x=0–2, alloys in magnetic fields up to 40 T are reported. The compounds with x=0.5–1 are helical antiferromagnets and those with 1<x?2 are helical ferromagnets or helical antiferromagnets at low and high T, respectively. Mn ions in the system carry average magnetic moment of 3.0±0.2 μB that couple antiparallelly to the Fe moments. Easy-plane magnetic anisotropy in the Ce2Fe17−xMnx compounds weakens upon substitution of Mn for Fe. The absolute value of the first anisotropy constant in the Ce2Fe17−xMnx helical ferromagnets decreases slower with increasing temperature than that calculated from the third power of the spontaneous magnetization. Noticeable magnetic hysteresis in the Ce2Fe17−xMnx, x=0.5–2, helical magnets over the whole range of magnetic fields reflects mainly irreversible deformation of the helical magnetic structure during the magnetization of the compounds. A contribution from short-range order (SRO) magnetic clusters to the magnetic hysteresis of the helical magnets has been also estimated. |
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Keywords: | 71 20 Eh 75 30 Gw |
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