Evolution from ferromagnetism to spin-glass behavior

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Abstract

The magnetic properties of amorphous (FexNi100−x)75P16B6Al3 have been investigated in the critical concentration region (xc ≈ 17) via neutron scattering. For x > xc a transition to ferromagnetism is first observed followed at lower temperatures by an evolution to spin-glass behavior. Associated with this low temperature state are two distinct time scales corresponding to a resolution-limited elastic peak and to excitations. The temperature dependence of the elastic component is directly related to the spin-glass order parameter and indicates that there is a region of temperature where ferromagnetism and spin-glass order coexist.

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