Journal article
Influence of Cr Doping on the Critical Behavior of Amorphous Alloy Ribbons Fe78–xCrxSi4Nb5B12Cu1
Chungbuk National University1
Hanoi University of Science and Technology2
Danang University of Technology3
Department of Energy Conversion and Storage, Technical University of Denmark4
Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark5
Department of Micro- and Nanotechnology, Technical University of Denmark6
Vietnamese Academy of Science and Technology7
Though many previous works focused on studying Cr-doped Fe–Si–Nb–B–Cu amorphous alloys, magnetic-interaction mechanismsin these materials have not been carefully investigated yet. Dealing with these issues, we have prepared the amorphous alloy ribbonsFe78−xCrx Si4Nb5B12Cu1 with x = 1, 3, and 6, and then studied their magnetic and critical properties.
Magnetization versustemperature and magnetic-field measurements, MHT, performed on a vibrating sample magnetometer reveal that the Cr-contentincrease in Fe78−xCrxSi4Nb5B12Cu1 reduces the TC from 430 K for x = 1 to about 322 K (for x = 6). This indicates the declineof ferromagnetic (FM) exchange interactions between Fe atoms when there is the presence of Cr atoms.
We have also analyzed theM(H) data at the temperatures in the vicinity of the TC using the modified Arrott plot method and the scaling hypothesis, anddetermined the values of the critical exponents β = 0.367–0.376 and γ = 1.315–1.338. These values are close to those expected forthe 3-D Heisenberg model with β = 0.365 and γ = 1.336, proving the existence of short-range FM order in the amorphous alloyribbons.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2014 |
| Pages: | 1-4 |
| ISSN: | 19410069 and 00189464 |
| Types: | Journal article |
| DOI: | 10.1109/TMAG.2014.2325949 |
3D Heisenberg model Amorphous magnetic materials Cr doping Fe<sub>78-x</sub>Cr<sub>x</sub>Si<sub>4</sub>Nb<sub>5</sub>B<sub>12</sub>Cu Frequency modulation Heisenberg model Magnetization Magnetometers Metals Saturation magnetization Temperature measurement amorphous alloy ribbons amorphous magnetic materials boron alloys chromium alloys copper alloys critical exponents critical properties doping exchange interactions (electron) ferromagnetic exchange interactions ferromagnetic materials iron alloys magnetic properties magnetic-field measurements magnetic-interaction mechanisms magnetisation magnetization modified Arrott plot method niobium alloys scaling hypothesis short-range FM order short-range ferromagnetism short-range order silicon alloys vibrating sample magnetometer
