Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 29, Issue 16, Pages 13903-13913Publisher
SPRINGER
DOI: 10.1007/s10854-018-9523-0
Keywords
-
Categories
Funding
- Guangxi Natural Science Foundation of China [2017GXNSFAA198338]
- Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University [GXYSOF1807]
- Guangxi University Student Innovation Foundation of China [201710593034]
Ask authors/readers for more resources
Soft/hard xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 (x = 0.00, 0.15, 0.30, and 0.45) core/shell magnetic composites have been synthesized by the ball-milling-assisted ceramic process. The analysis of XRD indicates the coexistence of NiFe2O4 and SrCo0.2Fe11.8O19. The core/shell structure of the composite sample has been confirmed by Fourier transform infrared spectra. When xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 precursor is calcined at 900 A degrees C, the crystallite size of obtained core/shell composites is between 28.3 and 46.6 nm in core NiFe2O4 and between 59.2 and 74.5 nm in shell SrCo0.2Fe11.8O19. Magnetic characterization indicates that specific saturation magnetization of xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 composites increases with the increase in calcination temperature, and decreases with the increase in mass ratio of soft to hard magnetic phase. Compared with bare SrCo0.2Fe11.8O19 calcined at 950 A degrees C, the specific saturation magnetization of xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 composites is decreased and coercivity is increased. This is attributed to the exchange-coupling interaction between the hard and soft phases due to formation of core/shell structure. Besides, remanence and magnetic moment of xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 composites decrease with the increase in NiFe2O4 content. The xNiFe(2)O(4)@(1-x)SrCo0.2Fe11.8O19 composites have higher squareness (M (r)/M (s)) value compared with the bare SrCo0.2Fe11.8O19, which is useful for high-density magnetic recording and enhanced memory storage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available