Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing

Khan, Mahmud; Alshammari, Ohud; Balasubramanian, Balamurugan; Das, Bhaskar; Sellmyer, David J.; Saleheen, Ahmad Us; Stadler, Shane

doi:10.1063/1.4977892

Title: Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing

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Abstract

Here we report on the structural and magnetic properties of Ni_0.2Mn_3.2Ga_0.6 melt-spun ribbons. The as-spun ribbons were found to exhibit mixed cubic phases that transform to non-cubic structure upon annealing. Additionally, an amorphous phase was found to co-exist in all ribbons. The SEM images show that minor grain formation occurs on the as-spun ribbons. However, the formation of extensive nano-grains was observed on the surfaces of the annealed ribbons. While the as-spun ribbons exhibit predominantly paramagnetic behavior, the ribbons annealed under various thermal conditions were found to be ferromagnetic with a Curie temperature of about 380 K. The ribbons annealed at 450 °C for 30 minutes exhibit a large coercive field of about 2500 Oe. The experimental results show that the microstructure and associated magnetic properties of the ribbons can be controlled by annealing techniques. The coercive fields and the shape of the magnetic hysteresis loops vary significantly with annealing conditions. As a result, exchange bias effects have also been observed in the annealed ribbons.

Authors:

Khan, Mahmud ^[1]; Alshammari, Ohud ^[1]; Balasubramanian, Balamurugan ^[2]; Das, Bhaskar ^[2]; Sellmyer, David J. ^[2]; Saleheen, Ahmad Us ^[3]; Stadler, Shane ^[3]

Department of Physics, Miami University, Oxford, Ohio 45056, USA
Department of Physics and Astronomy and Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588, USA
Department of Physics and Astronomy, Louisiana State University, Baton rouge, Louisiana 70803, USA

Publication Date:: Wed Mar 01 00:00:00 EST 2017

Research Org.:: Univ. of Nebraska, Lincoln, NE (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1349374

Alternate Identifier(s):: OSTI ID: 1393522; OSTI ID: 1421276

Grant/Contract Number:: FG02-04ER46152; FG02-13ER46946

Resource Type:: Published Article

Journal Name:: AIP Advances

Additional Journal Information:: Journal Name: AIP Advances Journal Volume: 7 Journal Issue: 5; Journal ID: ISSN 2158-3226

Publisher:: American Institute of Physics

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Nickel; Magnetic annealing; Magnetic materials; X-ray diffraction; Coercive force

Citation Formats


                    Khan, Mahmud, Alshammari, Ohud, Balasubramanian, Balamurugan, Das, Bhaskar, Sellmyer, David J., Saleheen, Ahmad Us, and Stadler, Shane. Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing.  United States: N. p., 2017. 
Web.  doi:10.1063/1.4977892.

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                    Khan, Mahmud, Alshammari, Ohud, Balasubramanian, Balamurugan, Das, Bhaskar, Sellmyer, David J., Saleheen, Ahmad Us, & Stadler, Shane. Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing.  United States.  https://doi.org/10.1063/1.4977892

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                    Khan, Mahmud, Alshammari, Ohud, Balasubramanian, Balamurugan, Das, Bhaskar, Sellmyer, David J., Saleheen, Ahmad Us, and Stadler, Shane. Wed .  
"Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing".  United States.  https://doi.org/10.1063/1.4977892.

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@article{osti_1349374,

  title        = {Controlling the microstructure and associated magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons by annealing},

  author       = {Khan, Mahmud and Alshammari, Ohud and Balasubramanian, Balamurugan and Das, Bhaskar and Sellmyer, David J. and Saleheen, Ahmad Us and Stadler, Shane},

  abstractNote = {Here we report on the structural and magnetic properties of Ni0.2Mn3.2Ga0.6 melt-spun ribbons. The as-spun ribbons were found to exhibit mixed cubic phases that transform to non-cubic structure upon annealing. Additionally, an amorphous phase was found to co-exist in all ribbons. The SEM images show that minor grain formation occurs on the as-spun ribbons. However, the formation of extensive nano-grains was observed on the surfaces of the annealed ribbons. While the as-spun ribbons exhibit predominantly paramagnetic behavior, the ribbons annealed under various thermal conditions were found to be ferromagnetic with a Curie temperature of about 380 K. The ribbons annealed at 450 °C for 30 minutes exhibit a large coercive field of about 2500 Oe. The experimental results show that the microstructure and associated magnetic properties of the ribbons can be controlled by annealing techniques. The coercive fields and the shape of the magnetic hysteresis loops vary significantly with annealing conditions. As a result, exchange bias effects have also been observed in the annealed ribbons.},

  doi          = {10.1063/1.4977892},

  journal      = {AIP Advances},

  number       = 5,

  volume       = 7,

  place        = {United States},

  year         = {Wed Mar 01 00:00:00 EST 2017},

  month        = {Wed Mar 01 00:00:00 EST 2017}

}

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