Method for cutting rare earth alloy, method for manufacturing rare earth magnet, and wire-saw mach

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A method for cutting a rare earth alloy using a wire with abrasive grains fixed to a core wire, including the step of cutting the rare earth alloy with the wire traveling in a state that a portion of the rare earth alloy to be cut with the wire is immersed in a coolant containing water as the main component, the coolant having a surface tension at 25° C. in a range of 25 mN/m to 60 mN/m.