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Title: Investigations on the electronic transport and piezoresistivity properties of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) Heusler alloys under hydrostatic pressure

Abstract

The resisitivity of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) magnetic shape memory alloys has been investigated as a function of temperature (4–300 K) and hydrostatic pressure up to 30 kilobars. The resistivity is suppressed (X = 0) and enhanced (X = 0.15) with increasing pressure. A change in piezoresistivity with respect to pressure and temperature is observed. The negative and positive piezoresistivity increases with pressure for both the alloys. The residual resistivity and electron-electron scattering factor as a function of pressure reveal that for Ni{sub 2}MnGa the electron-electron scattering is predominant, while the X = 0.15 specimen is dominated by the electron-magnon scattering. The value of electron-electron scattering factor is positive for both the samples, and it is decreasing (negative trend) for Ni{sub 2}MnGa and increasing (positive trend) for X = 0.15 with pressure. The martensite transition temperature is found to be increased with the application of external pressure for both samples.

Authors:
; ; ;  [1];  [2];  [1]
  1. UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore-452001, Madhya Pradesh (India)
  2. Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli-620 024 (India)
Publication Date:
OSTI Identifier:
22395581
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRIC CONDUCTIVITY; ELECTRON-ELECTRON COLLISIONS; ELECTRONS; GALLIUM; HEUSLER ALLOYS; INTERMETALLIC COMPOUNDS; MANGANESE; MARTENSITE; NICKEL; PRESSURE DEPENDENCE; SCATTERING; SHAPE MEMORY EFFECT; TEMPERATURE DEPENDENCE; TRANSITION TEMPERATURE

Citation Formats

Devarajan, U., Kalai Selvan, G., Sivaprakash, P., Arumugam, S., E-mail: sarumugam1963@yahoo.com, Singh, Sanjay, Experimentalphysik, Universiat Duisburg-Essen, D-47048 Duisburg, Esakki Muthu, S., SPSMS, CEA-INAC, 38054 Grenoble, and Roy Barman, S. Investigations on the electronic transport and piezoresistivity properties of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) Heusler alloys under hydrostatic pressure. United States: N. p., 2014. Web. doi:10.1063/1.4904711.
Devarajan, U., Kalai Selvan, G., Sivaprakash, P., Arumugam, S., E-mail: sarumugam1963@yahoo.com, Singh, Sanjay, Experimentalphysik, Universiat Duisburg-Essen, D-47048 Duisburg, Esakki Muthu, S., SPSMS, CEA-INAC, 38054 Grenoble, & Roy Barman, S. Investigations on the electronic transport and piezoresistivity properties of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) Heusler alloys under hydrostatic pressure. United States. https://doi.org/10.1063/1.4904711
Devarajan, U., Kalai Selvan, G., Sivaprakash, P., Arumugam, S., E-mail: sarumugam1963@yahoo.com, Singh, Sanjay, Experimentalphysik, Universiat Duisburg-Essen, D-47048 Duisburg, Esakki Muthu, S., SPSMS, CEA-INAC, 38054 Grenoble, and Roy Barman, S. 2014. "Investigations on the electronic transport and piezoresistivity properties of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) Heusler alloys under hydrostatic pressure". United States. https://doi.org/10.1063/1.4904711.
@article{osti_22395581,
title = {Investigations on the electronic transport and piezoresistivity properties of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) Heusler alloys under hydrostatic pressure},
author = {Devarajan, U. and Kalai Selvan, G. and Sivaprakash, P. and Arumugam, S., E-mail: sarumugam1963@yahoo.com and Singh, Sanjay and Experimentalphysik, Universiat Duisburg-Essen, D-47048 Duisburg and Esakki Muthu, S. and SPSMS, CEA-INAC, 38054 Grenoble and Roy Barman, S.},
abstractNote = {The resisitivity of Ni{sub 2−X}Mn{sub 1+X}Ga (X = 0 and 0.15) magnetic shape memory alloys has been investigated as a function of temperature (4–300 K) and hydrostatic pressure up to 30 kilobars. The resistivity is suppressed (X = 0) and enhanced (X = 0.15) with increasing pressure. A change in piezoresistivity with respect to pressure and temperature is observed. The negative and positive piezoresistivity increases with pressure for both the alloys. The residual resistivity and electron-electron scattering factor as a function of pressure reveal that for Ni{sub 2}MnGa the electron-electron scattering is predominant, while the X = 0.15 specimen is dominated by the electron-magnon scattering. The value of electron-electron scattering factor is positive for both the samples, and it is decreasing (negative trend) for Ni{sub 2}MnGa and increasing (positive trend) for X = 0.15 with pressure. The martensite transition temperature is found to be increased with the application of external pressure for both samples.},
doi = {10.1063/1.4904711},
url = {https://www.osti.gov/biblio/22395581}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 25,
volume = 105,
place = {United States},
year = {Mon Dec 22 00:00:00 EST 2014},
month = {Mon Dec 22 00:00:00 EST 2014}
}