TITLE

Twin microstructure dependent mechanical response in Ni–Mn–Ga single crystals

AUTHOR(S)
Straka, Ladislav; Lanska, Natalyia; Ullakko, Kari; Sozinov, Alexei
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p131903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ni–Mn–Ga single crystals with a twinning stress of about 0.1 MPa were studied. They showed a tendency to stay in a single variant state and to retain only one or very few twin boundaries during martensite reorientation induced by an external stress or magnetic field. This makes the crystals problematic for application in a magnetic actuator. To solve the issue, we introduced many parallel twin boundaries into the crystals by bending. However, this twin microstructure was not stable under cycling load. Additionally, it exhibited a twinning stress of 0.8 MPa—about ten times higher than a crystal with a single boundary.
ACCESSION #
48943863

 

Related Articles

  • Acoustic-assist effect on magnetic threshold field and twinning-yield stress of Ni–Mn–Ga single crystals. Techapiesancharoenkij, Ratchatee; Simon, Jesse; Bono, David; Allen, Samuel M.; O’Handley, Robert C. // Journal of Applied Physics;Aug2008, Vol. 104 Issue 3, p033907 

    Ni–Mn–Ga based ferromagnetic shape memory alloys (FSMAs) have been shown to exhibit large magnetic-field-induced strain (MFIS) up to 10% for frequencies up to 1 kHz. However, a magnetic threshold field of 150–300 kA/m is typically required to achieve MFIS, which will require...

  • Magnetic properties and large magnetic-field-induced strains in off-stoichiometric Ni-Mn-Al Heusler alloys. Fujita, A.; Fukamichi, K.; Gejima, F.; Kainuma, R.; Ishida, K. // Applied Physics Letters;11/6/2000, Vol. 77 Issue 19 

    Magnetic properties and magnetic-field-induced strains (MFIS) have been investigated for off-stoichiometric Ni-Mn-Al Heusler alloys with an ordered L2[sub 1] structure. A clear martensitic transformation in Ni[sub 53]Mn[sub 25]Al[sub 22] alloy was revealed below the Curie temperature. In the...

  • Reversible strain induced by martensite variant rearrangement under magnetic field and mechanical loading of Fe–Pd single crystals. Yamamoto, Tokujiro; Taya, Minoru // Applied Physics Letters;6/18/2007, Vol. 90 Issue 25, p251905 

    Reversible and repeatable strain without external bias stress was induced by applied magnetic field-induced martensite variant rearrangement (VR) and compressive stress-induced martensite VR for Fe–Pd single crystals. The amounts of the reversible strain induced by the magnetic field and...

  • Effect of intermartensite transformation on twinning stress in Ni-Mn-Ga 10 M martensite. Straka, L.; Sozinov, A.; Drahokoupil, J.; Kopecký, V.; Hänninen, H.; Heczko, O. // Journal of Applied Physics;Aug2013, Vol. 114 Issue 6, p063504 

    Intermartensite transformations (IMTs) and temperature dependence of very low twinning stress associated with Type II twin boundaries were studied experimentally in four magnetic shape memory alloys with composition Ni50Mn25 + xGa25 - x (at. %), where x was between 3.2 and 3.9. The slightly...

  • Low-field inverse magnetocaloric effect in Ni50-xMn39+xSn11 Heusler alloys. Han, Z. D.; Wang, D. H.; Zhang, C. L.; Xuan, H. C.; Gu, B. X.; Du, Y. W. // Applied Physics Letters;1/22/2007, Vol. 90 Issue 4, p042507 

    The low-field magnetic entropy changes in Ni50-xMn39+xSn11 alloys (x=5, 6, and 7) were investigated. The martensitic transition shifts to lower temperature with the increase of Mn concentration. Under an applied magnetic field of 10 kOe, the magnetic entropy changes are 6.8, 10.1, and 10.4 J/kg...

  • Magnetic shape memory: Magnetoelastic sponges. Acet, Mehmet // Nature Materials;Nov2009, Vol. 8 Issue 11, p854 

    The article focuses on the benefits of polycrystalline foams of nickel-manganese-gallium (Ni-Mn-Ga). Since Ni-Mn-Ga single crystals are difficult to grow and investments in wide-spread applications of such actuators are limited, Ni-Mn-Ga foams prepared under certain conditions when connected by...

  • Temperature dependence of effective g factor in diluted magnetic semiconductor (Ga,Mn)As. Zhou, R.; Sun, B. Q.; Ruan, X. Z.; Luo, H. H.; Ji, Y.; Wang, W. Z.; Zhang, F.; Zhao, J. H. // Journal of Applied Physics;Mar2008, Vol. 103 Issue 5, p053901 

    Time resolved magneto-optic Kerr rotation measurements of optically induced spin quantum beats are performed on heavily doped bulk (Ga,Mn)As diluted magnetic semiconductors (DMS). An effective g-factor of about 0.2–0.3 over a wide range of temperature for both as-grown and annealed...

  • Study of plastic deformation of the surface of an NiMnGa single crystal by the indentation method. Ostrikov, O.; Sozinov, A.; Soroka, A. // Journal of Engineering Physics & Thermophysics;Sep2012, Vol. 85 Issue 5, p1233 

    Distinctive features of plastic deformation of a magnetic NiMnGa alloy are studied by the method of local dosed deformation. It is found that the martensite phase of an NiMnGa single crystals is susceptible to mechanical twinning. Here twins represent thin lenses formed away from the imprint of...

  • Martensitic transformation and magnetic anisotropy in Ni-Mn-Ga/NaCl(001) thin films probed by ferromagnetic resonance. Aseguinolaza, I. R.; Golub, V.; Barandiarán, J. M.; Ohtsuka, M.; Müllner, P.; Salyuk, O. Y.; Chernenko, V. A. // Applied Physics Letters;5/6/2013, Vol. 102 Issue 18, p182401 

    By the ferromagnetic resonance and magnetometry measurements in a broad temperature range, it is found that the 220-fiber textured Ni51.4Mn28.3Ga20.3 (at. %) film of 100 nm thickness deposited onto NaCl(001) exhibits in the martensitic state an easy-plane magnetic anisotropy. This is in a...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics