Abstract
The present work demonstrates an isothermal reversible variation of magnetization in nanoporous Pd67Ni33 alloy during continuous charging and discharging of the alloy electrode in 1-M KOH solution. A custom-built electrochemical cell, containing the sample as working electrode performed the in situ charging experiments inside an extraction magnetometer at a constant applied magnetic field. The metal–electrolyte response was examined by varying the electrode potential, which apart from polarizing nanoporous structure, may also lead to electrodissociation of the electrolyte medium, being aqueous in nature. The result therefore analyzed hydrogenation as the key parameter for the observed reversible magnetization in the transition metal alloy at room temperature. In addition, electrochemical reactivity due to surface oxidation at the positive potential has been discussed, considering that a change in the band structure is also possible at the negative potential regime due to hydrogenation through cyclic voltammetry study.
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References
B.D. Cullity: Introduction to Magnetic Materials (Addition-Wesley, Reading, MA, 1972), p. 144.
H. Ohno, D. Chiba, F. Matsukura, T. Omiya, E. Abe, T. Dietl, Y. Ohno, and K. Ohtani: Electric-field control of ferromagnetism. Nature 408, 944 (2000).
H. Gleiter: Tuning the electronic structure of solids by means of nanometer-sized microstructures. Scr. Mater. 44, 1161 (2001).
J. Weissmüller, R.N. Viswanath, D. Kramer, P. Zimmer, R. Würschum, and H. Gleiter: Charge-induced reversible strain in a metal. Science 300, 312 (2003).
J. Biener, A. Wittstock, L.A. Zepeda-Ruiz, M.M. Biener, V. Zielasek, D. Kramer, R.N. Viswanath, J. Weissmüller, M. Bäumer, and A.V. Hamza: Surface-chemistry-driven actuation in nanoporous gold. Nature 8, 47 (2009).
W. Haiss: Surface stress of clean and adsorbate-covered solids. Rep. Prog. Phys. 64, 591 (2001).
R.J. Nichols, T. Nouar, C.A. Lucas, W. Haiss, and W.A. Hofer: Surface relaxation and surface stress of Au (1 1 1). Surf. Sci. 513, 263 (2002).
L. Kavan, R. Rapta, L. Dunsch, M.J. Bronikowski, P. Willis, and R.E. Smalley: Electrochemical tuning of electronic structure of single-walled carbon nanotubes: In-situ Raman and Vis-NIR study. J. Phys. Chem. B 105, 10764 (2001).
R.M. Bozorth: Ferromagnetism (Wiley-IEEE Press, New York, NY, 2003), p. 440.
R.H. Baughman, C. Cui, A.A. Zakhidov, Z. Iqbal, J.N. Barisci, G.M. Spinks, G.G. Wallace, A. Mazzoldi, D.D. Rossi, A.G. Rinzler, O. Jaschinski, S. Roth, and M. Kertesz: Carbon nanotube actuators. Science 284, 1340 (1999).
A.K. Mishra, C. Bansal, and H. Hahn: Surface charge induced variation in the electrical conductivity of nanoporous gold. J. Appl. Phys. 103, 094308 (2008).
M. Sagmeister, U. Brossmann, S. Landgraf, and R. Würschum: Electrically tunable resistance of a metal. Phys. Rev. Lett. 96, 156601 (2006).
C. Lemier, S. Ghosh, and J. Weissmueller: Charge induced variation of the magnetization in nanoporous Ni-Pd. MRS Proc. 876, R2.6 (2005).
S. Ghosh, C. Lemier, and J. Weissmüller: Charge-dependent magnetization in nanoporous Pd-Co Alloys. IEEE Trans. Magn. 42, 3617 (2006).
S. Ghosh: Charge-response of magnetization in nanoporous Pd–Ni alloys. J. Magn. Magn. Mater. 323, 552 (2011).
A.K. Mishra, C. Bansal, M. Ghafari, R. Kruk, and H. Hahn: Tuning properties of nanoporous Au-Fe alloys by electrochemically induced surface charge variations. Phys. Rev. B 81, 155452 (2010).
M. Grdeń, A. Czerwinski, J. Golimowski, E. Bulska, B. Krasnodebska-Ostrega, R. Marassi, and S. Zamponi: Hydrogen electrosorption in Ni–Pd alloys. J. Electroanal. Chem. 460, 30 (1999).
M. Grdeń, K. Kusmierczyk, and A. Czerwiński: Study of hydrogen electrosorption in Pd-Ni alloys by the quartz crystal microbalance. J. Solid State Electrochem. 7, 43 (2002).
M. Grdeń, K. Klimek, and A. Czerwiński: Quartz crystal microbalance studies on electrochemical behavior of electrodeposited Pd–Ni alloys. Electrochim. Acta 51, 2221 (2006).
H. Gleiter: Nanocrystalline materials. Prog. Mater. Sci. 33, 223 (2000).
H.P. Klug and L.E. Alexander: X-ray Diffraction Procedures: For Polycrystallite and Amorphous Materials, 2nd ed. (John Wiley and Sons, New York, 1974) p. 618.
R. Campesi, F. Cuevas, E. Leroy, M. Hirscher, R. Gadiou, C. Vix-Guterl, and M. Latroche: In situ synthesis and hydrogen storage properties of PdNi alloy nanoparticles in an ordered mesoporous carbon template. Microporous Mesoporous Mater. 117, 511 (2009).
W.A. Ferrando, R. Segnan, and A.I. Schindler: Matrix and impurity-cluster polarization in Ni-Pt and Ni-Pd alloys. Phys. Rev. B 5, 4657 (1972).
R.H. Kodama and A.E. Berkowitz: Atomic-scale magnetic modeling of oxide nanoparticles. Phys. Rev. B 59, 6321 (1999).
H.F. Biggs: The decrease in the paramagnetism of palladium caused by absorbed hydrogen. Philos. Mag. 32, 40 (1916).
B. Svensson: Die magnetische Suszeptibilität der elektrolytisch aufgeladenen Palladium-Wasserstofflegierungen. Ann. D. Phys. 410, 299 (1933).
X. Ke, G.J. Kramer, and O.M. Løvvik: The influence of electronic structure on hydrogen absorption in palladium alloys. J. Phys. Condens. Matter. 16, 6267 (2004).
H. Raffy, L. Dumoulin, and J.B. Burger: Enhancement of the magnetic hysteresis in ultrathin PdNi films by hydrogen absorption-desorption cycling. J. Magn. Magn. Mater. 69, 258 (1987).
E.A. Crespo, M. Ruda, and R.D.S. Debiaggi: Hydrogen absorption in Ni and Pd: A study based on atomistic calculations. Int. J. Hydrogen Energy 33, 3561 (2008).
H. Kurokova, T. Nakayama, Y. Kobayashi, K. Suzuki, M. Takahashi, S. Takami, M. Kubo, N. Itoh, P. Selvam, and A. Miyamoto: Monte Carlo simulation of hydrogen absorption in palladium and palladium–silver alloys. Catal. Today 82, 233 (2003).
J. Beille and G. Chouteau: Giant moments and pressure effects in Pd-Ni alloys. J. Phys. F: Met. Phys. 5, 721 (1975).
E. Tatsumoto, H. Fujiwara, T. Okamoto, and H. Fujii: Effect of hydrostatic pressures on the Curie temperature in Pd-Ni Alloys. J. Phys. Soc. Jpn. 25, 1734 (1968).
C.D.J. Gelatt, H. Ehrenreich, and J.A. Weiss: Transition-metal hydrides: Electronic structure and the heats of formation. Phys. Rev. B 17, 1940 (1978).
J. Mathon: Pressure dependence of the magnetization in the itinerant electron model of ferromagnetism. J. Phys. F: Met. Phys. 2, 159 (1972).
S.G. Das, D.D. Koelling, and F.M. Mueller: Pressure dependence of the electronic structure and Fermi surface of palladium. Solid State Commun. 12, 89 (1973).
Acknowledgments
The author is greatly indebted to Dr. Joerg Weissmueller and Dr. Christian Lemier for extended support to this work and Mr. Torsten Scherer for the EDX analysis of the samples. Financial support from the Center for Functional Nanostructures (CFN), Karlsruhe is also acknowledged.
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Ghosh, S. Switching magnetic order in nanoporous Pd–Ni by electrochemical charging. Journal of Materials Research 28, 3010–3017 (2013). https://doi.org/10.1557/jmr.2013.291
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DOI: https://doi.org/10.1557/jmr.2013.291