TY - GEN
T1 - Microstructure and magnetic properties of rapidly solidified Ni 2(Mn,Fe)Ga Heusler alloys
AU - Prasad, R. V.S.
AU - Manivel Raja, M.
AU - Phanikumar, G.
PY - 2009
Y1 - 2009
N2 - This study reports detailed microstructural and magnetic characterization of rapidly solidified Ni2(Mn,Fe)Ga heusler alloys processed using the melt spinning technique. Series of Ni50Mn(25-x)Fe( x= 2, 5, 8, 11)Ga25 alloys were prepared by vacuum arc melting and then melt spun at constant wheel speed of 20 m/sec to obtain samples in the form of ribbons. X-ray diffraction analysis of as-cast Ni 2(Mn,Fe)Ga alloy with different 'Fe' concentrations revealed austenite phase with L21 Heusler atomic order at room temperature. Transmission electron microscopy of melt spun ribbons reveals a precursor tweed structures due to magnetic tweed contrast when the 'Fe' concentrations are 8% and 11%. In case of 11% 'Fe' substituted alloy martensite phase was found to from at the grain boundary triple junctions. Thermo magnetic measurements determine that, as the 'Fe' concentration increases from 2 to 11%; it enhances the magnetic transition temperature from 375 to 403 K.
AB - This study reports detailed microstructural and magnetic characterization of rapidly solidified Ni2(Mn,Fe)Ga heusler alloys processed using the melt spinning technique. Series of Ni50Mn(25-x)Fe( x= 2, 5, 8, 11)Ga25 alloys were prepared by vacuum arc melting and then melt spun at constant wheel speed of 20 m/sec to obtain samples in the form of ribbons. X-ray diffraction analysis of as-cast Ni 2(Mn,Fe)Ga alloy with different 'Fe' concentrations revealed austenite phase with L21 Heusler atomic order at room temperature. Transmission electron microscopy of melt spun ribbons reveals a precursor tweed structures due to magnetic tweed contrast when the 'Fe' concentrations are 8% and 11%. In case of 11% 'Fe' substituted alloy martensite phase was found to from at the grain boundary triple junctions. Thermo magnetic measurements determine that, as the 'Fe' concentration increases from 2 to 11%; it enhances the magnetic transition temperature from 375 to 403 K.
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U2 - 10.4028/www.scientific.net/AMR.74.215
DO - 10.4028/www.scientific.net/AMR.74.215
M3 - Conference contribution
AN - SCOPUS:73649087317
SN - 0878493212
SN - 9780878493210
T3 - Advanced Materials Research
SP - 215
EP - 218
BT - NEMS/MEMS Technology and Devices - Selected, peer reviewed papers from the International Conference on Materials for Advanced Technologies 2009, ICMAT 2009
T2 - International Conference on Materials for Advanced Technologies, ICMAT 2009
Y2 - 28 June 2009 through 3 July 2009
ER -