Magnetism of simple cubic antiferromagnet Pt3Fe alloy was studied by neutron scattering under uniaxtial pressure. NW temperature while relative intensity of the (1)/(1)(2)/(2)0 Bragg peak at the low-temperature phase decreased under the uniaxial pressure. Actual nonincreased, collinear magnetic structure model at the low-temperature phase was proposed under the reasonable assumption. (c) 2006 Elsevier B.V. All rights reserved.