Magnetic field-induced phase transformation in NiMnColn magnetic shape-memory alloys-a new actuation mechanism with large work output

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Haluk E. Karaca
  • Ibrahim Karaman
  • Burak Basaran
  • Yuny I. Chumlyakov
  • Ham J. Maier

Detail(s)

Original languageEnglish
Pages (from-to)983-998
Journal / PublicationAdvanced Functional Materials
Volume19
Issue number7
Publication statusPublished - 9 Apr 2009
Externally publishedYes

Abstract

magnetic shape memory alloys (MSMAs) have recently been developed into a new class of functional materials that are capable of magnetic-field-induced actuation, mechanical sensing, magnetic refrigeration, and energy harvesting. In the present, work, the magnetic field-induced martensitc phase transformation (FIPT) in Ni<sub>45</sub>Mn<sub>36.5</sub>Co<sub>5</sub>In<sub>13.5</sub> MSMA single crystals is characterized as a new actuation mechanism with potential to result in ultra-high actuation work outputs. The effects of the applied magnetic field on the transformation temperatures, magnetization, and superelastic response are investigated The magnetic work output, of NiMnCoin alloys is determined to he more than 1 Mj m<sup>-3</sup> per Tesia, which is one order of magnitude higher than that of the most well-known MSMAs, i.e., NIMnGa alloys. in addition, the work output of NiMnColn alloys is orientation independent, potentially surpassing the need for single crystals, and not. limited by a saturation magnetic field, as opposed to NiMnGa MSMAs. Experimental and theoretical transformation strains and magnetostress levels are determined as a function of crystal orientation. It is found that [111]-oriented crystals can demonstrate a magnetostress level of 140 MPa T<sup>-1</sup> with 1.2% axial strain under compression. These field-induced stress and strain levels are significantly higher than those from existing piezoelectric and magnetostrictive actuators, A thermodynamical framework is introduced to comprehend the magnetic energy contributions during FIPT The present work reveals that the magnetic FIPT mechanism is promising for magnetic actuation applications and provides new opportunities for applications requiring high actuation work-outputs with relatively large actuation frequencies. One potential issue is the requirement for relatively high critical magnetic fields and field intervals (1.5-3T) for the onset of FIPT and for reversible FIPT. respectively. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.

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Citation Format(s)

Magnetic field-induced phase transformation in NiMnColn magnetic shape-memory alloys-a new actuation mechanism with large work output. / Karaca, Haluk E.; Karaman, Ibrahim; Basaran, Burak; Ren, Yang; Chumlyakov, Yuny I.; Maier, Ham J.

In: Advanced Functional Materials, Vol. 19, No. 7, 09.04.2009, p. 983-998.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review