Average Magnetization and Fe Hyperfine Fields in Co₂FeSi-based Heusler Alloys

• Authors: L. Kiss , G. Bortel , L. Bujdosó , D. Kaptás , T. Kemény , I. Vincze
• Languages of publication: EN

Abstracts

EN

In the present study SQUID magnetic and ^{57}Fe Mössbauer measurements were performed on bulk Co₂FeAl_{1-x}Siₓ, Co₂Fe_{0.9}TM_{0.1}Si (TM = Ti, V, Cr, Mn, Co, Ni, Cu), Co_{2-y}Fe_{1+y}Si and Co₂Fe_{1+z}Si_{1-z} samples prepared by induction melting. The Co₂FeAl_{1-x}Siₓ shows the L2₁ crystal structure only for x ≥ 0.5, between x = 0 and 0.3 it has the B2 structure (Fe-Al, Si disorder). The average magnetization of these alloys does not follow the expected Slater-Pauling trend (on the Si side saturation is observed around 5.75 μ_{B}/f.u.) and similar deviation is observed for the replacement of Fe by transition metal (TM) atom. The effect of the antisite disorder (Fe-Si) on the magnetization and Fe hyperfine parameters was determined and significant decrease in the Co magnetic moment for excess Si neighbourhood is extrapolated. The formerly reported large ≈ 6 μ_{B}/f.u. magnetization for Co₂FeSi was observed only in samples having Fe excess and Si deficiency.

Keywords

EN

75.50.Cc; 76.80.+y

Discipline

• 76.80.+y: Mössbauer effect; other γ-ray spectroscopy(see also 33.45.+x Mössbauer spectra—in atomic and molecular physics; for biophysical applications, see 87.64.kx; for chemical analysis applications, see 82.80.Ej)
• 75.50.Cc: Other ferromagnetic metals and alloys

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2015
• Volume: 127
• Issue: 2
• Pages: 347-349

Dates

published

2015-02

Contributors

author

L. Kiss

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

author

G. Bortel

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

author

L. Bujdosó

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

author

D. Kaptás

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

author

T. Kemény

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

author

I. Vincze

• Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P.O.Box 49, Hungary

References

• [1] I. Galanakis, P.H. Dederichs, N. Papanikolaou, Phys. Rev. B 66, 174429 (2002), doi: 10.1103/PhysRevB.66.174429
• [2] S. Wurmehl, G.H. Fecher, H.C. Kandpal, V. Ksenofontov, C. Felser, H.-J. Lin, J. Morais, Phys. Rev. B 72, 184434 (2005), doi: 10.1103/PhysRevB.72.184434
• [3] G.H. Fecher C. Felser, J. Phys. D: Appl. Phys. 40, 1582 (2007), doi: 10.1088/0022-3727/40/6/S12
• [4] B. Balke, G.H. Fecher, C. Felser, Appl. Phys. Lett. 90, 242503 (2007), doi: 10.1063/1.2748341
• [5] T.M. Nakatani, A. Rajanikanth, Z. Gercsi, Y.K. Takahashi, K. Inomata, K. Hono, J. Appl. Phys. 102, 033916 (2007), doi: 10.1063/1.2767229
• [6] R.Y. Umetsu, A. Okubo, R. Kainuma, J. Appl. Phys. 111, 073909 (2012), doi: 10.1063/1.3700220
• [7] M. Meinert, J.-M. Schmalhorst, M. Glas, G. Reiss, E. Arenholz, T. Böhnert, K. Nielsch, Phys. Rev. B 86, 054420 (2012), doi: 10.1103/PhysRevB.86.054420
• [8] L. Makinistan, M.M. Faiz, R.P. Panguluri, B. Balke, S. Wurmehl, C. Felser, E.A. Albanesi, G. Petukhov, B. Nadgorny, Phys. Rev. B 87, 220402 (2013), doi: 10.1103/PhysRevB.87.220402
• [9] D. Bombor, C.G.F. Blum, O. Volkonskiy, S. Rodan, S. Wurmehl, C. Hess, B. Büchner, Phys. Rev. Lett. 110, 066601 (2013), doi: 10.1103/PhysRevLett.110.066601
• [10] L.F. Kiss, D. Kaptás, J. Balogh, J. Magn. Magn. Mater. 368, 202 (2014), doi: 10.1016/j.jmmm.2014.05.034

Identifiers

DOI

10.12693/APhysPolA.127.347