| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Optimizing Magnetostriction Coefficients in (FeGa)B Nanocrystalline Alloys |
| Author(s) |
Jenna K. Jaklich, Mohammad Tauhidul Islam, Matthew Willard, Bowen Dong, Alexander Yu, Yumi Ijiri, Emily Moore, Scott McCall |
| On-Site Speaker (Planned) |
Jenna K. Jaklich |
| Abstract Scope |
Galfenol, an (Fe,Ga)-based alloy, is interesting for sensor technologies because of its sizable magnetostriction coefficient; however, in order to be effective in these applications, the material’s magnetic softness must be improved. To reduce the coercivity, we have prepared a series of nanocrystalline galfenol-like alloys and examined their magnetic and structural properties. We report studies on a series of four synthesized (Fe80Ga20)100-xBx samples with x=8-17 prepared by rapid solidification and subsequent isothermal annealing. Samples were annealed at temperatures between 425°C and 550°C for up to four hours to examine the effects heat treatment has on the crystallinity of the samples. The sample with x=17 annealed at 450°C for 30 minutes was found to have the largest magnetostriction 31 ppm, a median magnetization 138.7 (Am2/kg), but the smallest coercivity 2271 (A/m). Several crystalline phases but primarily the Fe3Ga (L12) phase were identified by XRD. (Supported by LLNL under Contract DE-AC52-07NA2) |