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Title: Controlling the microstructure and associated magnetic properties of Ni 0.2Mn 3.2Ga 0.6 melt-spun ribbons by annealing

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:
 [1];  [1];  [2];  [2];  [2];  [3];  [3]
  1. Miami Univ., Oxford, OH (United States)
  2. Univ. of Nebraska, Lincoln, NE (United States)
  3. Louisiana State Univ., Baton Rouge, LA (United States)
Publication Date:
Research Org.:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1349374
Alternate Identifier(s):
OSTI ID: 1393522; OSTI ID: 1421276
Grant/Contract Number:  
FG02-04ER46152; FG02-13ER46946
Resource Type:
Journal Article: Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 5; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
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.
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. doi:10.1063/1.4977892.
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. doi:10.1063/1.4977892.
@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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4977892

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