التفاصيل البيبلوغرافية
| العنوان: |
Magnetic and mechanical properties of (Fe, Co)–Pt bulk alloys prepared through various processing techniques. |
| المؤلفون: |
Saha, S., Thong, C. J., Huang, M. Q., Obermyer, R. T., Zande, B. J., Chandhok, V. K., Simizu, S., Sankar, S. G. |
| المصدر: |
Journal of Applied Physics; 5/15/2002 Part 1, 2 & 3, Vol. 91 Issue 10, p8810, 3p, 2 Charts, 6 Graphs |
| مصطلحات موضوعية: |
IRON compounds, ALLOYS |
| مستخلص: |
Magnetic and mechanical properties of Fe[sub 60]Pt[sub 40], Fe[sub 60.5]Pt[sub 39.5] and (Fe[sub 1-χ]Co[sub χ])[sub 60.5]Pt[sub 39.5] bulk alloys prepared by a number of processing techniques have been examined. Processing techniques include induction melting, mechanical milling (at ∼77 K), hot and cold work, and melt extraction. Magnetic properties were determined in the temperature range from 300 to 1100 K using a vibrating sample magnetometer. Melt extracted Fe[sub 60.5]P[sub 39.5] sample appeared to be fully dense and the magnetic properties found to be 4πM[sub s] (at 1.5 T)∼l.08 T, H[sub c] ∼ 270.6 kA/m, and (BH)[sub max]∼55.7 kJ/m³. Freezer milled Fe[sub 60.5]Pt[sub 39.5] sample (loose powder) showed a saturation induction of 1.33 T, and coercivity of 270.6 kA/m at room temperature. Curie temperature for this sample is found to be 450 °C. For the Fe[sub 45.37]Co[sub 15.13]Pt[sub 39.5] (loose powder) sample, coercivity increases to 318 kA/m and the Curie temperature increases to 540 °C. Tensile strength was measured for selected samples. It is found that Fe-Pt and (Fe,Co)-Pt magnets are about 5-10 times mechanically stronger than the rare earth based permanent magnets. Preliminary examination of the structural and magnetic properties of these alloys indicates that the (Fe,Co)-Pt bulk alloys are an excellent system to explore exchange coupling mechanism in permanent magnets. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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