Abstract
The effect of magnetic-field annealing on the strain sensitivity (q) and saturation magnetostriction (λs) of NiFe2O4 nanoparticles synthesized by citrate-gel method was investigated. The use of field-annealing resulted in improved magnetoelastic properties at the expense of coercivity. A maximum λs of −40ppm at 2kOe, associated with q value of −3.3ppm/Oe at 5Oe was achieved in the field-annealed NiFe2O4.
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