Tuning of Exchange-Biased Ni-Mn/Fe-Ni Films With High Blocking Temperatures
| العنوان: | Tuning of Exchange-Biased Ni-Mn/Fe-Ni Films With High Blocking Temperatures |
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| المؤلفون: | M. E. Moskalev, V. O. Vas’kovskiy, Egor V. Kudyukov, V. N. Lepalovskij |
| المصدر: | IEEE Magnetics Letters. 10:1-5 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010302 applied physics, Materials science, Analytical chemistry, 02 engineering and technology, Coercivity, Atmospheric temperature range, 021001 nanoscience & nanotechnology, Magnetic hysteresis, 01 natural sciences, Temperature measurement, Electronic, Optical and Magnetic Materials, Exchange bias, 0103 physical sciences, Antiferromagnetism, Thermal stability, 0210 nano-technology, Layer (electronics) |
| الوصف: | Effect of a reduction in an antiferromagnetic layers’ thickness and insertion of a Ta spacer on thermal behavior of exchange bias field, coercivity, and on blocking temperature of Ni-Mn-based exchange-biased films is studied. Reduction of a Ni-Mn layer's thickness from 20 to 17.5 nm to 14 and 12 nm gradually decreases the exchange bias field. The dependence of the blocking temperature on the thickness of a Ni-Mn layer shows a finite-size scaling effect with a maximum blocking temperature of 650 K for a 20 nm thick antiferromagnetic layer. Despite that, an unusually stable or even increasing exchange bias is present for some thicknesses in the temperature range up to 400 K. Addition of a Fe-Ni buffer with an increase in Ni concentration in Ni-Mn layer yields a greater exchange-bias-field-to-coercivity ratio and an even better thermal stability of exchange bias, which remains steady in the range from 300 to 475 K. Addition of a very thin Ta spacer (0.1 nm, 0.2 nm, or 0.3 nm thick) significantly decreases the exchange bias field, while only slightly decreasing the blocking temperature. A peak in the coercivity at around 700 K is found for all of the studied films, and is likely due to structural transformations. |
| تدمد: | 1949-3088 1949-307X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::955768b1c22dff91bc89a42dce12a5b8 https://doi.org/10.1109/lmag.2019.2943132 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........955768b1c22dff91bc89a42dce12a5b8 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19493088 1949307X |
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