Exchange Bias in Ni-Mn-Sn Heusler Alloy Films

• Authors: I. Gościańska , K. Załęski , H. Głowiński , Yu. Kudryavtsev , J. Dubowik
• Languages of publication: EN

Abstracts

EN

We report a relatively large exchange bias effect observed for the first time in Ni-Mn-Sn thin films with different microstructure and composition: a Ni_{50}Mn_{36}Sn_{14} epitaxial film (A), a Ni_{50}Mn_{43}Sn_7 film which is phase decomposed (B), and a NiMn/Ni_{50}Mn_{25}Sn_{25} bilayer (C). Despite the samples differ markedly in both microstructure and composition H_{EB} does not substantially differs at 5 K. Exchange bias decreases with increasing T approximately as H_{EB} (T) ∝ H_{EB} (5K)/T with H_{EB} (5K) of 180 Oe and 60 Oe for sample B and C, respectively and almost linearly for sample A with H_{EB} (5K) = 65 Oe. Blocking temperature where the exchange bias vanishes is 40, 50 and 80 K for sample A, C and B, respectively. The results suggest that the role of AFM/FM interfaces is not substantial in formation of exchange bias in Ni-Mn-Sn Heusler alloy films and exchange bias is rather related to AFM/FM interactions in nanoscale.

Keywords

EN

75.70.Ak; 75.30.Et

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.70.Ak: Magnetic properties of monolayers and thin films

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 5-6
• Pages: 1179-1181

Dates

published

2012-05

Contributors

author

I. Gościańska

• Department of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

K. Załęski

• Institute of Molecular Physics, PAS, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

H. Głowiński

• Institute of Molecular Physics, PAS, M. Smoluchowskiego 17, 60-179 Poznań, Poland

author

Yu. Kudryavtsev

• Institute of Metal Physics, NANU, Vernadsky Ave. 36, Kiev-142, Ukraine

author

J. Dubowik

• Institute of Molecular Physics, PAS, M. Smoluchowskiego 17, 60-179 Poznań, Poland

References

• 1. Zhe Li, J. Chen, S. Yuan, S. Cao, J. Zhang, Appl. Phys. Lett. 91, 112505 (2007)
• 2. S. Aksoy, M. Acet, P.P. Deen, L. Manosa, A. Planes, Phys. Rev. B 79, 212401 (2009)
• 3. S. Chatterjee, S. Gori, S.K. De, S. Majumdar, Phys. Rev. B 79, 092410 (2009)
• 4. B.M. Wang, Y. Liu, P. Ren, B. Xia, K.B. Ruan, J.B. Yi, J. Ding, X.G. Li, L. Wang, Phys. Lett. 106, 077203 (2011)
• 5. T. Krenke, M. Acet, E.F. Wassermann, X. Moya, L. Manosa, A. Planes, Phys. Rev. B 72, 014412 (2005)
• 6. W.M. Yuhasz, D.L. Schlagel, Q. Xing, K.W. Denis, R.W. McCallum, T.A. Lograsso, J. Appl. Phys. 105, 07A921 (2009)
• 7. J. Keller, P. Miltény, B. Beshoten, G. Güntherodt, U. Nowak, K.D. Usadel, Phys. Rev. B 66, 11431 (2002)

Identifiers

DOI

10.12693/APhysPolA.121.1179