Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys
Physical properties of Co30Cu70 mechanical alloys prepared by ball milling were investigated. After milling for 50 h, the powder contained Co-rich, Cu-rich clusters as well as Co-Cu solid solution. Annealing at 200 - 300 °C for 30 min modified thermal behaviors but only slightly affected magnetic pr...
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| Format: | Article |
| Language: | English |
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Walailak University
2011-11-01
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| Series: | Walailak Journal of Science and Technology |
| Subjects: | |
| Online Access: | http://wjst.wu.ac.th/index.php/wjst/article/view/141 |
| _version_ | 1818790236484796416 |
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| author | Watcharee RATTANASAKULTH Chitnarong SIRISATHITKUL |
| author_facet | Watcharee RATTANASAKULTH Chitnarong SIRISATHITKUL |
| author_sort | Watcharee RATTANASAKULTH |
| collection | DOAJ |
| description | Physical properties of Co30Cu70 mechanical alloys prepared by ball milling were investigated. After milling for 50 h, the powder contained Co-rich, Cu-rich clusters as well as Co-Cu solid solution. Annealing at 200 - 300 °C for 30 min modified thermal behaviors but only slightly affected magnetic properties. Higher temperature annealing (400 - 500 °C) led to substantial oxidation of Co and Cu and deteriorated magnetic properties. Pressed Co30Cu70 pellets exhibited 0.6 - 2 % giant magnetoresistance (GMR) but showed modest GMR after heat treatment. GMR disappeared by annealing at 500 °C as large fractions of Co and Cu were converted into oxides. |
| first_indexed | 2024-12-18T14:52:15Z |
| format | Article |
| id | doaj.art-ea0f1d75b0c046bbbd52fbf7e3cbcce4 |
| institution | Directory Open Access Journal |
| issn | 1686-3933 2228-835X |
| language | English |
| last_indexed | 2024-12-18T14:52:15Z |
| publishDate | 2011-11-01 |
| publisher | Walailak University |
| record_format | Article |
| series | Walailak Journal of Science and Technology |
| spelling | doaj.art-ea0f1d75b0c046bbbd52fbf7e3cbcce42022-12-21T21:04:08ZengWalailak UniversityWalailak Journal of Science and Technology1686-39332228-835X2011-11-013210.2004/wjst.v3i2.141134Effects of Annealing Temperature on Co30Cu70 Mechanical AlloysWatcharee RATTANASAKULTH0Chitnarong SIRISATHITKUL1Department of Physics, Faculty of Science, Kasetsart University, Bangkok 10900Magnet Laboratory, Molecular Technology Research Unit, School of Science, Walailak University, Nakhon Si Thammarat 80161Physical properties of Co30Cu70 mechanical alloys prepared by ball milling were investigated. After milling for 50 h, the powder contained Co-rich, Cu-rich clusters as well as Co-Cu solid solution. Annealing at 200 - 300 °C for 30 min modified thermal behaviors but only slightly affected magnetic properties. Higher temperature annealing (400 - 500 °C) led to substantial oxidation of Co and Cu and deteriorated magnetic properties. Pressed Co30Cu70 pellets exhibited 0.6 - 2 % giant magnetoresistance (GMR) but showed modest GMR after heat treatment. GMR disappeared by annealing at 500 °C as large fractions of Co and Cu were converted into oxides.http://wjst.wu.ac.th/index.php/wjst/article/view/141Giant magnetoresistancemechanical alloyingannealing |
| spellingShingle | Watcharee RATTANASAKULTH Chitnarong SIRISATHITKUL Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys Walailak Journal of Science and Technology Giant magnetoresistance mechanical alloying annealing |
| title | Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys |
| title_full | Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys |
| title_fullStr | Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys |
| title_full_unstemmed | Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys |
| title_short | Effects of Annealing Temperature on Co30Cu70 Mechanical Alloys |
| title_sort | effects of annealing temperature on co30cu70 mechanical alloys |
| topic | Giant magnetoresistance mechanical alloying annealing |
| url | http://wjst.wu.ac.th/index.php/wjst/article/view/141 |
| work_keys_str_mv | AT watchareerattanasakulth effectsofannealingtemperatureonco30cu70mechanicalalloys AT chitnarongsirisathitkul effectsofannealingtemperatureonco30cu70mechanicalalloys |