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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Jian Zhang Ji-Zhong Song Yun Zhang Fang Wang Bi-Cheng Chen Bao-Gen Shen Ji-Rong Sun |
| Copyright Year | 1965 |
| Abstract | The magnetization reversal mechanism and temperature dependence of magnetic properties of Cr(50 nm)/[SmCo6(9 nm)/Cu(x nm)/Fe(5 nm)/Cu(x nm)]6/Cr(100 nm)/a-SiO2 (x = 0-0.75) exchange spring multilayer films are reported. The initial curves and angular-dependent coercivities measurement indicate that the magnetization reversal mechanism of multilayer films is determined by domain-wall pinning. With lowering the temperature, the coercivities of multilayer films increase largely. By inserting Cu layer between the hard and soft layers can increase the coercivity of the multilayer films, especially at low temperatures. The hysteresis loops of the film with x = 0.75 annealed at 500°C measured from 10 to 400 K show all the single-phase behavior, although the film contains a large amount of soft phase (≈40 vol%), indicating the strong exchange coupling between the hard and soft phase and the extremely large nucleation field in the soft layers. With the decrease of temperature, the maximum energy product (BH)max and remanence also increase. A large (BH)max of about 37.4 MGOe is obtained at 10 K for the film with x = 0.75 annealed at 500°C. The recoiling curves as well as the irreversible change in magnetization -ΔMirrev(H)/2Mr = [Mr - Md(H)]/2Mr versus the reverse field H demonstrate the increase of the inhomogeneity and pinning in the hard layer at the low temperature as well as after the addition of Cu, therefore, an improved coercivity. |
| Sponsorship | IEEE Magnetics Society |
| Starting Page | 2792 |
| Ending Page | 2795 |
| Page Count | 4 |
| File Size | 584439 |
| File Format | |
| ISSN | 00189464 |
| Volume Number | 47 |
| Issue Number | 10 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2011-10-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Nonhomogeneous media Coercive force Copper Temperature measurement Magnetic hysteresis Annealing Magnetic multilayers maximum energy product $(BH)_{{\rm max}}$ Coercivity exchange spring multilayer film |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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