Rare earth magnet and method for producing thereof

A rare earth magnet comprising a main phase and a grain boundary phase present around the main phase, wherein

• the overall composition is represented, in terms of molar ratio, by the formula:
• (R1(1-x)Lax)y(Fe(1-z)Coz)(100-y-w-v)BwM1v·(R2(1-s)M2s)t, wherein each of R1 and R2 is one or more elements selected from the group consisting of Nd, Pr, Gd, Tb, Dy and Ho, M1 includes In and optionally one or more elements selected from the group consisting of Ga, Al, Cu, Au, Ag, Zn, and Mn, and an unavoidable impurity element, M2 is composed of a metal element which is other than a rare earth element and can be alloyed with R2, and unavoidable impurity elements,
• 0≤x≤0.1,
• 12.0≤y≤20.0,
• 0.1≤z≤0.3,
• 5.0≤w≤20.0, and
• 0≤v≤2.0,
• 0.05≤s≤0.40, and
• 0.1≤t≤10.0,
• x and z satisfy z≤2x+0.2,
• the main phase has an R2Fe14B-type crystal structure, wherein R is a rare earth element,
• the average particle diameter of the main phase is less than 1 μm, and
• the volume ratio of a phase having an RFe2-type crystal structure in the grain boundary phase is 0.40 or less relative to the grain boundary phase.