Abstract
We report on magnetic amorphous (Fe0.85Nd0.15)0.6B0.4 nanoparticles showing an enhanced thermagnetic stability regarding to their size, with a blocking temperature higher than room temperature. Magnetization and Mössbauer spectroscopy results suggest that the ideally spherical nanoparticles conformation is almost equally distributed between an ordered core and an iron oxide shell (Fe2O3). Magnetization measurements are described by a phenomenological model comprising a ferromagnetic core represented by the Bloch´s law and a magnetically disordered contribution obeying the Curie law. The interaction of the core with the oxide shell would be enough to thermally stabilize the nanoparticles against superparamagnetism.
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Notes
A TB ~ 380 K was estimated by fitting the coercive field vs. temperature using the Stoner-Wolfarth model.
To calculate the Msat of the alloy, only the ferromagnetic contribution of the Fe was considered, given that Nd is paramagnetic at RT and it is consequently not saturated.[N. W. Ashcroft and N. D. Mermin, Solid State Physiscs, Saunders College Publishing, 1976].
References
Q.A. Pankhurst, J.S. Connoly, S.K. Jones, J. Dobson, J. Phys. D: Appl. Phys 36(13), R167–R181 (2003). https://doi.org/10.1088/0022-3727/36/13/201
Z. Zhang, Y.C. Feng, T. Clinton, G. Badran, N. Yeh, G. Tarnopolsky, E. Girt, M. Munteanu, S. Harkness, H. Richter, T. Nolan, R. Ranjan, S. Hwang, G. Rauch, M. Ghaly, D. Larson, E. Singleton, V. Vas’ko, J. Ho, F. Stageberg, K. Vee, K. Duxstad, S. Slade, IEEE Tran. Magn. 38, 1861–1866 (2002). https://doi.org/10.1109/TMAG.2002.801782
W.H. Azmi, M.Z. Sharif, T.M. Yusof, R. Mamat, A.A.M. Redhwan, Renew. Sustain. Energy Rev. 69, 415–428 (2017). https://doi.org/10.1016/j.rser.2016.11.207
C.B. Bean, J.D. Livingston, J. Appl. Phys. 30, 120S-129S (1959). https://doi.org/10.1063/1.2185850
R.H. Kodama, A.E. Berkowitz, E.J. McNiff, S. Foner, Phys. Rev. Lett. 77, 394–397 (1996). https://doi.org/10.1103/PhysRevLett.77.394
V. Skumryev, S. Stoyanov, Y. Zhang, G. Hadjipanayis, D. Givord, J. Nogués, Nature 423, 850–853 (2003). https://doi.org/10.1038/nature01687
J.B. Tracy, D.N. Weiss, D.P. Dinega, M.G. Bawendi, Phys. Rev. B 72, 064404 (2005). https://doi.org/10.1103/PhysRevB.72.064404
G.C. Hadjipanayis, J. Magn. Mater. 200, 373–391 (1999)
K. Simeonidis, C. Sarafidis, E. Papastergiadis, M. Angelakeris, I. Tsiaoussis, O. Kalogirou, Intermetallics 19, 589–595 (2011). https://doi.org/10.1016/j.intermet.2010.12.012
H. Wakayama, H. Yonekura, Mater. Chem. Phys. 227, 265–268 (2019). https://doi.org/10.1016/j.matchemphys.2019.01.073
R.C. O‘Handley, Hard Magnetic Materials Modern Magnetic Materials: Principles and Applications (Willey, New York, Chichester, Weinheim, Brisbane, Singapore, Toronto, 2000), pp.503–511
R.D. Zysler, C.A. Ramos, H. Romero, A. Ortega, J. Mater. Sci. 36(9), 2291–2294 (2001). https://doi.org/10.1023/A:1017524923761
M. Tortarolo, R. Zysler, H. Romero, H. Troiani, Physica B 354, 117–120 (2004). https://doi.org/10.1016/j.physb.2004.09.031
E. Murad, J. H. Johnston, in Mössbauer Spectroscopy Applied to Inorganic Chemistry, vol. 2. ed. by G. Long (Plenum Publ. Corp., New York, 1987), p. 507.
L. Machala, R. Zboril, A. Gedanken, J. Phys. Chem. B 111(16), 4003–4018 (2007). https://doi.org/10.1021/jp064992s
I.S. Lyubutin, S.S. Starchikov, T.V. Bukreeva, I.A. Lysenko, S.N. Sulyanov, N.Y. Korotkov, S.S. Rumyantseva, I.V. Marchenko, K.O. Funtov, A. Vasiliev, L, Mater. Sci. Eng. C Mater. Biol. Appl. 45, 225–233 (2014). https://doi.org/10.1016/j.msec.2014.09.017
K. Závěta, A. Lančok, M. Maryško, E. Pollert, D. Horák, J. Czechoslov, J. Phys. 56(3), E83–E91 (2006). https://doi.org/10.1007/s10582-006-0474-y
R. Prozorov, T. Prozorov, S.K. Mallapragada, B. Narasimhan, T.J. Williams, D.A. Bazylinski, Phys. Rev. B: Condens. Matter 76, 54406 (2007). https://doi.org/10.1103/PhysRevB.76.054406
P. Ayyub, M. Multani, M. Barma, V.R. Palkar, R. Vijayaraghavan, J. Phys. C: Solid State Phys. 21, 2229–2246 (1988). https://doi.org/10.1088/0022-3719/21/11/014
R. Oshima, F.E. Fujita, Jpn. J. Appl. Phys. 20, 1 (1981). https://doi.org/10.1143/JJAP.20.1
C.L. Chien, K.M. Unruh, Phys. Rev. B 25(9), 5790–5796 (1982). https://doi.org/10.1103/PhysRevB.25.5790
D. Rodríguez, F. Plazaola, J. Garitaonandia, Hyperfine Interact. 169, 1231–1234 (2006). https://doi.org/10.1007/s10751-006-9429-8
E. De Biasi, R.D. Zysler, C.A. Ramos, H. Romero, D. Fiorani, Phys. Rev. B 71, 104408 (2005). https://doi.org/10.1103/PhysRevB.71.104408
E. Tronc, D. Fiorani, M. Nogués, A.M. Testa, F. Lucari, F. D’Orazio, J.M. Grenèche, W. Wernsdorfer, N. Galvez, C. Chenéac, D. Mailly, J.P. Jolivet, J. Magn. Magn. Matter 262(1), 6–14 (2003). https://doi.org/10.1016/S0304-8853(03)00011-8
M. B. Molina Concha., E. de Biasi., R. D. Zysler, Physica B 403, 390–393 (2008). https://doi.org/10.1016/j.physb.2007.08.057
H. Kachkachi, A. Ezzir, M. Noguès, E. Tronc, Eur. Phys. J. B 14, 681–689 (2000). https://doi.org/10.1007/s100510051079
J.P. Chen, C.M. Sorensen, K.J. Klabunde, G.C. Hadjipanayis, Phys. Rev. B51(17), 11527–11532 (1995). https://doi.org/10.1103/physrevb.51.11527
J. Merikoski, J. Timonen, M. Mannien, P. Jena, Phys. Rev. Lett 66, 938–941 (2011). https://doi.org/10.1103/PhysRevLett.66.938
C.M. Wang, D.R. Baer, L.E. Thomas, J.E. Amonette, J. Antony, Y. Qiang, G. Duscher, J. App. Phys. 98, 094308 (2005). https://doi.org/10.1063/1.2130890
Acknowledgments
We thank Dr D. Lamas for the fruitful discussions on XRD characterization. Nanoparticles were synthesized by Dr H. Romero, Universidad de los Andes, Mérida, Venezuela.
Funding
A. Mijovilovich is grateful for funding by the Ministry of Education, Youth and Sports of the Czech Republic with co-financing from the EU (Grant ¨KOROLID¨, CZ.02.1.01/0.0/0.0/15_003/0000336) and the Czech Academy of Sciences (RVO 600 600 77 344). M. Tortarolo, R. D. Zysler and C. P. Ramos thank CNEA and INN.
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Tortarolo, M., Mijovilovich, A., Macedo, W.A.A. et al. Magnetic behavior of oxide passivated (Fe0.85Nd0.15)0.6B0.4 amorphous nanoparticles. MRS Communications 13, 438–444 (2023). https://doi.org/10.1557/s43579-023-00368-9
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DOI: https://doi.org/10.1557/s43579-023-00368-9