Hard magnetic property of Mn-Ga-Al melt-spun ribbons

Pham Thi Thanh; Nguyen Mau Lam; Dinh Thi Kim Oanh; Nguyen Huy Ngoc; Kieu Xuan Hau; Nguyen Hai Yen; Truong Viet Anh; Vu Manh Quang; Nguyen Thi Nguyet  Nga; Nguyen Huy Dan

doi:10.15625/2525-2518/16330

Author affiliations

Authors

Pham Thi Thanh Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam
Nguyen Mau Lam Hanoi Pedagogical University 2, 32 Nguyen Van Linh, Xuan Hoa, Phuc Yen, Vinh Phuc, Viet Nam
Dinh Thi Kim Oanh Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam
Nguyen Huy Ngoc Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam
Kieu Xuan Hau Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam
Nguyen Hai Yen Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam
Truong Viet Anh Hanoi University of Science and Technology, 1 Dai Co Viet, 100000 Ha Noi, Viet Nam
Vu Manh Quang Hanoi Pedagogical University 2, 32 Nguyen Van Linh, Xuan Hoa, Phuc Yen, Vinh Phuc, Viet Nam
Nguyen Thi Nguyet Nga Hung Vuong University, Nong Trang, 290000 Phu Tho, Viet Nam
Nguyen Huy Dan Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Ha Noi, Viet Nam

DOI:

https://doi.org/10.15625/2525-2518/16330

Keywords:

Coercive mechanism, rare earth-free magnets, hard magnetic materials, melt-spinning method

Abstract

. Mn-Ga-based alloy system has exhibited hard magnetic properties, although this alloy system contains no rare earth elements. However, magnetic parameters of Mn-Ga alloys have not yet been comparable to those of rare earth magnets such as Nd-Fe-B, Sm-Co, etc. Therefore, enhancement of the magnetic properties of the Mn-Ga-based alloys has interestingly been researched by scientists in the world. Partial replacement of both the Ga and Mn by other elements (Al, Cu, Bi, Cr, etc.) with suitable synthesis conditions (annealing temperature, annealing time, etc.) have shown improvement in the magnetic properties of the Mn-Ga-based alloys. In this paper, we investigated the effect of Al concentration and annealing conditions on the structure and magnetic properties of Mn₆₅Ga_25-xAl_10+x (x = 0, 5 and 10) alloy ribbons prepared by melt-spinning method. Crystalline phases of MnAl, D0₁₉-type Mn₃Ga and D0₂₂-type Mn₃Ga were found in all the ribbons. The D0₂₂-type Mn₃Ga hard magnetic phase is dominated by appropriate Al concentration and annealing conditions. Coercivities, H_c, greater than 10 kOe were achieved on the alloys at an optimal annealing temperature and time of 650 ^oC and 1 h, respectively. The obtained results show applicability of the Mn-Ga-based alloys as a new kind of rare earth-free hard magnetic materials in applications.

Downloads

Download data is not yet available.

References

Jun C., Matt K., Lin Z., Fei Liu, Alexander G., George H., Balamurugan B. and David S. - Current progress and future challenges in rare-earth-free permanent magnets, Acta Mater. 158 (2018) 118-137. https://doi.org/10.1016/j.actamat.2018.07.049.

Xuan Z., Zhongwu L., Hongya Y., Hui Z. and Guoqing Z. - Optimization of rapidly quenched Co–Zr and (Co,Fe)–Zr alloys for rare earth free permanent magnets, Phys. B Condens. Matter. 599 (2020) 412549. https://doi.org/10.1016/j.physb.2020.412549.

Brandt A. J., Wei T., Xubo L., Alexandra I. N., Gaoyuan O., Kevin W. D. and Jun C. - Optimizing composition in MnBi permanent magnet alloys, Acta Mater. 181 (2019) 595-602. https://doi.org/10.1016/j.actamat.2019.10.003.

Chang H. W., Liao M. C., Shih C. W., Chang W. C., Yang C. C., Hsiao C. H. and Ouyang H. - Hard magnetic property enhancement of Co7Hf-based ribbons by boron doping, Appl. Phys. Lett. 105 (2014) 192404. https://doi.org/10.1063/1.4901737.

Goto S., Kura H., Watanabe E., Hayashi Y., Yanagihara H., Shimada Y., Mizuguchi M., Takanashi K. and Kita E. - Synthesis of single-phase L10-FeNi magnet powder by nitrogen insertion and topotactic extraction, Sci. Rep. 7 (2017) 13216. https://doi.org/10.1038/s41598-017-13562-2.

Lyubina J., Gutfleisch O., Muller K. H. and Schultz L. and Dempsey N. M. - Nanocrystalline hard magnetic FePt powders, J. Appl. Phys. 95 (2004) 7474-7476. https://doi.org/10.1063/1.1652393.

Goyal R., Arora N., Kapoor A., Lamba S. and Annapoorni S. - Exchange hardening in FePt/Fe3Pt dual exchange spring magnet: Monte Carlo modeling, J. Alloys Comp. 695 (2017) 1014-1019. https://doi.org/10.1016/j.jallcom.2016.10.224.

Volegov A. S., Muller K. H., Bittner F., Mix T., Neznakhin D. S., Volegova E. A., Schultz L., Woodcock T. G. and Nenkov K. - Magnetic viscosity of L10 structured Mn-Ga and Mn-Al alloys, J. Magn. Magn. Mater. 441 (2017) 750-756.

http://dx.doi.org/10.1016/j.jmmm.2017.06.087.

Wei J. Z., Wu R., Yunbo Y., Xuegang C., Yuanhua X., Yang Y. C., Changsheng W. and Jinbo Y. Structural properties and large coercivity of bulk Mn3-xGa (0 ≤ x ≤ 1.15), J. Appl. Phys. 115 (2014) 17A736. https://doi.org/10.1063/1.4866844 .

Zhengying J., Yuxiao J., Bochen L., Jingmin W. and Chengbao J. - Microstructure and magnetic properties of (Mn54Al46)98C2 magnets fabricated by liquid-phase sintering with the Mn65Ga35 as an additive, J. Magn. Magn. Mater. 534 (2021) 168037. https://doi.org/10.1016/j.jmmm.2021.168037.

Alina D. C., Aurel L., Cristina B., Ioan D. and Ovidiu C. - Magnetism and ε-τ Phase Transformation in MnAl-Based Nanocomposite Magnets, Nanomaterials 11 (2021) 896-909. https://doi.org/10.3390/nano11040896.

Zhongwu L., Chen C., Zheng Z. G., Tan B. H. and Raju V. R. - Phase transitions and hard magnetic properties for rapidly solidified MnAl alloys doped with C, B, and rare earth elements, J. Mater. Scien. 47 (2021) 2333-2338. https://doi.org/10.1007/s10853-011-6049-8.

Wannisa T., Thanida C., Panissa S., Pongsakorn J., Chesta R. and Chitnarong S. - Effects of Carbon Doping and Annealing Temperature on Magnetic MnAl Powders and MnAl Polymeric Composites, Appl. Sci. 11 (2021) 2067-2078.

https://doi.org/10.3390/app11052067.

Hui D. Q., Yang Y., Jung T. L., Jong W. K., Chul J. C. and Jihoon P. - Effects of Mg and Sb Substitution on the Magnetic Properties of Magnetic Field Annealed MnBi Alloys, Nanomaterials 10 (2020) 2265-2277. https://doi.org/10.3390/nano10112265.

Ramakrishna V. V., Kavita S., Ramesh T., Ravi G. and Gopalan R. - On the Structural and Magnetic Properties of Mn-Bi Alloy Jet Milled at Different Feed Rates, J. Supercond. Nov. Magn. 34 (2021)733-737. https://doi.org/10.1007/s10948-020-05749-y.

Daniel R. B., Ke H. and Theo S. - Hard magnetic properties observed in bulk Mn1−xGax, J. Appl. Phys. 115 (2014) 17A723. https://doi.org/10.1063/1.4864141.

Kurt H., Rode K., Venkatesan M., Stamenov P. and Coey J. M. D. - Mn3−xGa (0 ≤ x ≤ 1): Multifunctional thin film materials for spintronics and magnetic recording, Phys. Status Solidi B 248 (2011) 2338-2344. https://doi.org/10.1002/pssb.201147122.

Krishnan K. M. - Ferromagnetic δ‐Mn1−xGax thin films with perpendicular anisotropy, Appl. Phys. Lett. 61 (1992) 2365-2367. https://doi.org/10.1063/1.108245.

Ener S., Skokov K. P., Dmitriy Y. K., Michael D. K. and Oliver G. - Magnet properties of Mn70Ga30 prepared by cold rolling and magnetic field annealing, J. Magn. Magn. Mater. 382, (2015) 265-270. https://doi.org/10.1016/j.jmmm.2015.02.001.

Daniel R. B., Ke H., Theo S., Tiglet B. and Rongmei N. - High Magnetic Field Annealing of Mn-Ga Intermetallic Alloys, MRS Advances 1, (2016) 227 - 233. https://doi.org/10.1557/adv.2015.26.