Abstract
Highly oriented Ni–Mn–Ga thin film with multiple variants and room temperature orthorhombic martensite structure were prepared on a single crystalline Al2O3 \(\left({11\bar 20} \right)\) substrate by DC magnetron sputtering. X-ray diffraction and rocking curve measurements reveal the film as (202)7M oriented with an excellent crystal quality (Δω = 1.8°). Spot-like pole figures indicate that the Ni–Mn–Ga film grows with a strong in-plane preferred orientation. An in-depth analysis of the measured pole figure reveals the presence of a retained austenite phase in the film. Two phase transformations, MS ∼345 K and TC ∼385 K, are observed and are attributed to first order structural transformation from cubic to orthorhombic, and second order phase transformation from ferromagnetic to paramagnetic, respectively. In situ high temperature x-ray diffraction measurements provide a clear indication of a thermally-induced martensite ↔ austenite reversible structural phase transformation in the film. The presence of martensite plates with seven modulated orthorhombic structure and adaptive nano-twins are some of the important microscopic features observed in the film with transmission electron microscopy investigations.
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A. Sozinov, A. Likhachev, N. Lanska, and K. Ullakko: Giant magnetic-field-induced strain in NiMnGa seven-layered martensitic phase. Appl. Phys. Lett. 80, 1746 (2002).
E. Faran and D. Shilo: Implications of twinning kinetics on the frequency response in NiMnGa actuators. Appl. Phys. Lett. 100, 151901 (2012).
K. Otsuka and C.M. Wayman: Shape Memory Materials (Cambridge University Press, Cambridge, 1999).
Y. Sutou, Y. Imano, N. Koeda, T. Omori, R. Kainuma, K. Ishida, and K. Oikawa: Magnetic and martensitic transformations of NiMnX (X = In, Sn, Sb) ferromagnetic shape memory alloys. Appl. Phys. Lett. 85, 4358 (2004).
T. Kakeshita, T. Takeuchi, T. Fukuda, M. Tsujiguchi, T. Saburi, R. Oshima, and S. Muto: Giant magnetostriction in an ordered Fe3Pt single crystal exhibiting a martensitic transformation. Appl. Phys. Lett. 77, 1502 (2000).
R.D. James and M. Wuttig: Magnetostriction of martensite. Philos. Mag. A 77, 1273 (1998).
K. Oikawa, T. Ota, F. Gejima, T. Ohmori, R. Kainuma, and K. Ishida: Phase equilibria and phase transformations in new B2-type ferromagnetic shape memory alloys of Co–Ni–Ga and Co–Ni–Al systems. Mater. Trans. 42, 2472 (2001).
K. Oikawa, L. Wulff, T. Iijima, F. Gejima, T. Ohmori, A. Fujita, K. Fukamichi, R. Kainuma, and K. Ishida: Promising ferromagnetic Ni–Co–Al shape memory alloy system. Appl. Phys. Lett. 79, 3290 (2001).
J. Marcos, L. Mañosa, A. Planes, F. Casanova, X. Batlle, and A. Labarta: Multiscale origin of the magnetocaloric effect in Ni–Mn–Ga shape-memory alloys. Phys. Rev. B: Condens. Matter Mater. Phys. 68, 094401 (2003).
B. Kiefer and D.C. Lagoudas: Magnetic field-induced martensitic variant reorientation in magnetic shape memory alloys. Philos. Mag. 85, 4289 (2005).
H. Karaca, I. Karaman, B. Basaran, D. Lagoudas, Y.I. Chumlyakov, and H. Maier: On the stress-assisted magnetic-field-induced phase transformation in Ni2MnGa ferromagnetic shape memory alloys. Acta Mater. 55, 4253 (2007).
M. Ohtsuka, M. Matsumoto, and K. Itagaki: Effect of iron and cobalt addition on magnetic and shape memory properties of Ni2MnGa sputtered films. Mater. Sci. Eng., A 438, 935 (2006).
G.J. Mahnke, M. Seibt, and S. Mayr: Microstructure and twinning in epitaxial NiMnGa films. Phys. Rev. B: Condens. Matter Mater. Phys. 78, 012101 (2008).
M. Thomas, O. Heczko, J. Buschbeck, U. Rößler, J. McCord, N. Scheerbaum, L. Schultz, and S. Fähler: Magnetically induced reorientation of martensite variants in constrained epitaxial Ni–Mn–Ga films grown on MgO (001). New J. Phys. 10, 023040 (2008).
A. Backen, S.R. Yeduru, M. Kohl, S. Baunack, A. Diestel, B. Holzapfel, L. Schultz, and S. Fähler: Comparing properties of substrate-constrained and freestanding epitaxial Ni–Mn–Ga films. Acta Mater. 58, 3415 (2010).
A. Sharma, S. Mohan, and S. Suwas: Development of bi-axial preferred orientation in epitaxial NiMnGa thin films and its consequence on magnetic properties. Acta Mater. 113, 259 (2016).
P. Tello, F. Castano, R.C. O’Handley, S.M. Allen, M. Esteve, F. Castano, A. Labarta, and X. Batlle: Ni–Mn–Ga thin films produced by pulsed laser deposition. J. Appl. Phys. 91, 8234 (2002).
A. Hakola, O. Heczko, A. Jaakkola, T. Kajava, and K. Ullakko: Pulsed laser deposition of NiMnGa thin films on silicon. Appl. Phys. A 79, 1505 (2004).
H. Rumpf, C. Craciunescu, H. Modrow, K. Olimov, E. Quandt, and M. Wuttig: Successive occurrence of ferromagnetic and shape memory properties during crystallization of NiMnGa freestanding films. J. Magn. Magn. Mater. 302, 421 (2006).
X. Jin, M. Marioni, D. Bono, S. Allen, R. O’Handley, and T. Hsu: Empirical mapping of Ni–Mn–Ga properties with composition and valence electron concentration. J. Appl. Phys. 91, 8222 (2002).
L. Righi, F. Albertini, L. Pareti, A. Paoluzi, and G. Calestani: Commensurate and incommensurate “5M” modulated crystal structures in Ni–Mn–Ga martensitic phases. Acta Mater. 55, 5237 (2007).
J. Pons, V. Chernenko, R. Santamarta, and E. Cesari: Crystal structure of martensitic phases in Ni–Mn–Ga shape memory alloys. Acta Mater. 48, 3027 (2000).
N. Lanska, O. Soderberg, A. Sozinov, Y. Ge, K. Ullakko, and V. Lindroos: Composition and temperature dependence of the crystal structure of Ni–Mn–Ga alloys. J. Appl. Phys. 95, 8074 (2004).
V. Martynov and V. Kokorin: The crystal structure of thermally-and stress-induced martensites in Ni2MnGa single crystals. J. Phys. III 2, 739 (1992).
L. Righi, F. Albertini, E. Villa, A. Paoluzi, G. Calestani, V. Chernenko, S. Besseghini, C. Ritter, and F. Passaretti: Crystal structure of 7M modulated Ni–Mn–Ga martensitic phase. Acta Mater. 56, 4529 (2008).
G. Jakob and H.J. Elmers: Epitaxial films of the magnetic shape memory material Ni2MnGa. J. Magn. Magn. Mater. 310, 2779 (2007).
G. Jakob, T. Eichhorn, M. Kallmayer, and H.J. Elmers: Correlation of electronic structure and martensitic transition in epitaxial Ni2MnGa films. Phys. Rev. B: Condens. Matter Mater. Phys. 76, 174407 (2007).
J. Tillier, D. Bourgault, P. Odier, L. Ortega, S. Pairis, O. Fruchart, N. Caillault, and L. Carbone: Tuning macro-twinned domain sizes and the b-variants content of the adaptive 14-modulated martensite in epitaxial Ni–Mn–Ga films by co-sputtering. Acta Mater. 59, 75 (2011).
B. Yang, Y. Zhang, Z. Li, G. Qin, X. Zhao, C. Esling, and L. Zuo: Insight into variant selection of seven-layer modulated martensite in Ni–Mn–Ga thin films grown on MgO (001) substrate. Acta Mater. 93, 215 (2015).
B. Yang, Z.B. Li, Y.D. Zhang, G.W. Qin, C. Esling, O. Perroud, X. Zhao, and L. Zuo: Microstructural features and orientation correlations of non-modulated martensite in Ni–Mn–Ga epitaxial thin films. Acta Mater. 61, 6809 (2013).
L. Schulz: A direct method of determining preferred orientation of a flat reflection sample using a Geiger Counter x-ray spectrometer. J. Appl. Phys. 20, 1030 (1949).
K. Pawlik and P. Ozga: LaboTex: the texture analysis software. Göttinger Arbeiten zur Geologie und Paläontologie, SB4 (1999).
D.C. Dunand and P. Müllner: Size effects on magnetic actuation in Ni–Mn–Ga shape-memory alloys. Adv. Mater. 23, 216 (2011).
M. Hordon and B. Averbach: X-ray measurements of dislocation density in deformed copper and aluminum single crystals. Acta Metall. 9, 237 (1961).
I. Petrov, P. Barna, L. Hultman, and J. Greene: Microstructural evolution during film growth. J. Vac. Sci. Technol., A 21, S117 (2003).
P. Gay, P. Hirsch, and A. Kelly: The estimation of dislocation densities in metals from x-ray data. Acta Metall. 1, 315 (1953).
P. Stadelmann: JEMS JAVA electron microscopy software. Version 2 (2004); p. W2005.
D.Y. Cong, Y.D. Zhang, C. Esling, Y.D. Wang, J.S. Lecomte, X. Zhao, and L. Zuo: Microstructural and crystallographic characteristics of interpenetrating and non-interpenetrating multiply twinned nanostructure in a Ni–Mn–Ga ferromagnetic shape memory alloy. Acta Mater. 59, 7070 (2011).
D.Y. Cong, Y.D. Zhang, Y.D. Wang, M. Humbert, X. Zhao, T. Watanabe, L. Zuo, and C. Esling: Experiment and theoretical prediction of martensitic transformation crystallography in a Ni–Mn–Ga ferromagnetic shape memory alloy. Acta Mater. 55, 4731 (2007).
B. Yang, Y. Zhang, Z. Li, G. Qin, C. Esling, X. Zhao, and L. Zuo: Crystallographic orientation of modulated martensite in epitaxially grown Ni–Mn–Ga thin film. Thin Solid Films 584, 90 (2015).
P.J. Brown, B. Dennis, J. Crangle, T. Kanomata, M. Matsumoto, K-U. Neumann, L.M. Justham, and K.R.A. Ziebeck: Stability of martensitic domains in the ferromagnetic alloy Ni2MnGa: A mechanism for shape memory behaviour. J. Phys.: Condens. Matter 16, 65 (2003).
A. Khachaturyan, S. Shapiro, and S. Semenovskaya: Adaptive phase formation in martensitic transformation. Phys. Rev. B: Condens. Matter Mater. Phys. 43, 10832 (1991).
J. Pons, R. Santamarta, V. Chernenko, and E. Cesari: Structure of the layered martensitic phases of Ni–Mn–Ga alloys. Mater. Sci. Eng., A 438, 931 (2006).
M. Johnson, P. Bloemen, F. Den Broeder, and J. De Vries: Magnetic anisotropy in metallic multilayers. Rep. Prog. Phys. 59, 1409 (1996).
L. Straka, O. Heczko, and K. Ullakko: Investigation of magnetic anisotropy of Ni–Mn–Ga seven-layered orthorhombic martensite. J. Magn. Magn. Mater. 272, 2049 (2004).
O. Heczko, K. Jurek, and K. Ullakko: Magnetic properties and domain structure of magnetic shape memory Ni–Mn–Ga alloy. J. Magn. Magn. Mater. 226, 996 (2001).
Y. Zhang, R. Hughes, J. Britten, J. Preston, G. Botton, and M. Niewczas: Self-activated reversibility in the magnetically induced reorientation of martensitic variants in ferromagnetic Ni–Mn–Ga films. Phys. Rev. B: Condens. Matter Mater. Phys. 81, 054406 (2010).
ACKNOWLEDGMENTS
This work was sponsored by Department of Information Technology (DietY), MCIT, Govt. of India. We acknowledge Dr. S.V Kamat and Dr. Manivel Raja (Defense Metallurgical Research Laboratory, Hyderabad, India) for providing sputtering target for the present work. The characterization of as deposited films were carried out at Micro and Nano Characterization Facility at Center for Nano Science and Engineering and AFMM, Indian Institute of Science. The author is also thankful to Prof. Rajeev Ranjan for allowing to use the X-ray facility for this work.
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Sharma, A., Mohan, S. & Suwas, S. Structural transformations in highly oriented seven modulated martensite Ni–Mn–Ga thin films on an Al2O3 \(\left({11\bar 20} \right)\) substrate. Journal of Materials Research 31, 3016–3026 (2016). https://doi.org/10.1557/jmr.2016.317
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DOI: https://doi.org/10.1557/jmr.2016.317