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Kari Ullakko

Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory

SCHOLARLY PAPERS

8

DOWNLOADS

475

TOTAL CITATIONS

0

Scholarly Papers (8)

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1.

Transformation Behavior and Inverse Magnetocaloric Effect in Ni 45Co 5Mn 36.7In 13.3-X Ge X Melt-Spun Ribbons

Number of pages: 15 Posted: 27 Jun 2023
Meysam Norouzi-Inallu, Ali Ghotbi Varzaneh, Parviz Kameli, Kari Ullakko, Volodymyr Chernenko, Hideki Hosoda and Daniel Salazar
Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory, Isfahan University of Technology - Department of Physics, Isfahan University of Technology - Department of Physics, Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory, University of the Basque Country - Basque Center for Materials, Applications and Nanostructures (BCMaterials), Tokyo Institute of Technology - Institute of Innovative Research and University of the Basque Country - Basque Center for Materials, Applications and Nanostructures (BCMaterials)
Downloads 95 (720,278)

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Ni45Co5Mn36.7In13.3-xGex Metamagnetic shape memory alloys, Melt-spun ribbons, Martensitic transformation, Inverse magnetocaloric effect

2.

Relationship between Edge-Grip Induced Defects on Silicon Wafers and Near-Edge Flatness

Number of pages: 7 Posted: 16 Sep 2022
HAO HU, Kari Ullakko and Xin Lai
IEEE Senior Member, Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory and affiliation not provided to SSRN
Downloads 73 (899,324)

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Light point defects (LPD), Edge site frontsurface-referenced least squares/range (ESFQR), Process-induced defects, Z-height double derivative (ZDD).

3.

Increase of Twinning Stress in Single Crystalline Ni-Mn-Ga Micropillars

Number of pages: 15 Posted: 27 Sep 2023
Denys Musiienko, Jaromír Kopeček, R.H. Colman, Kari Ullakko and Oleg Heczko
Academy of Sciences of the Czech Republic - Institute of Physics, Academy of Sciences of the Czech Republic - Institute of Physics, Charles University, Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory and FZU - Institute of Physics of the Czech Academy of Sciences
Downloads 70 (883,195)

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ferromagnetic shape memory, micropillars, twinning, focused ion beam, scanning electron microscopy, Ni-Mn-Ga

4.

Stability of Incommensurately Modulated Ni50Mn27Ga22Fe1 10M Martensite Under Uniaxial Tensile Stress

Number of pages: 14 Posted: 29 Jan 2024
Mariia Vinogradova, Alexei Sozinov, Ladislav Straka, Petr Veřtát, Oleg Heczko, Martin Zelený, R. Chulist and Kari Ullakko
Lappeenranta-Lahti University of Technology (LUT), Tikomat Oy, FZU - Institute of Physics of the Czech Academy of Sciences, Academy of Sciences of the Czech Republic - Institute of Physics, FZU - Institute of Physics of the Czech Academy of Sciences, Brno University of Technology, Polish Academy of Sciences (PAS) - Institute of Metallurgy and Materials Science and Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory
Downloads 67 (907,769)

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Magnetic Shape Memory, Ni-Mn-Ga, X-ray diffraction, Incommensurately Modulated Crystal Structure

5.

Etch Rates for Micromachining Process in Manufacturing Hybrid Microdevices Composed of Ni-Mn-Ga and Silicon Layers

Number of pages: 7 Posted: 20 Jul 2022
HAO HU and Kari Ullakko
IEEE Senior Member and Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory
Downloads 57 (989,921)

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Microelectromechanical systems (MEMS), Ni-Mn-Ga, hybrid device, actuator, ferromagnetic shape memory, MSM

6.

Multi-Instrumental Approach to Domain Walls and Their Movement in Ferromagnetic Steels - Origin of Barkhausen Noise Studied by Microscopy Techniques

Number of pages: 24 Posted: 21 Jun 2023
Suvi Santa-aho, Mari Honkanen, Sami Kaappa, Lucio Azzari, Andrey Saren, Kari Ullakko, Lasse Laurson and Minnamari Vippola
Tampere University, Tampere University, Tampere University, Tampere University, Lappeenranta-Lahti University of Technology (LUT), Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory, Tampere University and Tampere University
Downloads 48 (1,086,013)

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Ferromagnetic steel, magnetic domains, Domain wall dynamics, Barkhausen noise, magnetic force microscopy, Lorentz microscopy

7.

Elastic Properties of Ni50Mn27Ga22Fe1 10M Martensite with Incommensurate Lattice Modulation

Number of pages: 32 Posted: 29 May 2025
Alexei Sozinov, Mariia Vinogradova, Andrey Saren, Ladislav Straka, Martin Zelený, R. Chulist, Pavla Stoklasová, Hanuš Seiner and Kari Ullakko
Tikomat Oy, Lappeenranta-Lahti University of Technology (LUT), Lappeenranta-Lahti University of Technology (LUT), FZU - Institute of Physics of the Czech Academy of Sciences, Brno University of Technology, Polish Academy of Sciences (PAS) - Institute of Metallurgy and Materials Science, Czech Academy of Sciences - Institute of Thermomechanics, Czech Academy of Sciences - Institute of Thermomechanics and Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory
Downloads 46 (1,121,190)

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Magnetic Shape Memory, Martensite, Incommensurate lattice modulation, Elastic properties, Twin boundary

8.

Effect of Moderate Fe Doping and Heat Treatment on the Microstructure of Ni-Mn-Ga Melt-Spun Ribbons

Number of pages: 16 Posted: 20 Jun 2023
Mahsa Namvari, James Rosero Romo, Daniel Salazar, ville Laitinen, Aditya Kumthekar and Kari Ullakko
LUT University, affiliation not provided to SSRN, University of the Basque Country - Basque Center for Materials, Applications and Nanostructures (BCMaterials), LUT University, LUT University and Lappeenranta-Lahti University of Technology (LUT) - Material Physics Laboratory
Downloads 19 (1,459,862)

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ferromagnetic shape memory alloys, grain growth, melt-spun ribbons, martensitic transformation temperature