Soft magnetic powder, dust core, magnetic compound and method of manufacturing dust core

A soft magnetic powder represented by FeaSibBcPdCreMf, except for inevitable impurities, wherein:

• M is at least one element selected from Co, Ni, Cu and Zn;
• 0 atomic %≤b≤6 atomic %;
• 4 atomic %≤c≤10 atomic %;
• 5 atomic %≤d≤12 atomic %;
• 0 atomic %<e;
• 0.4 atomic %≤f<6 atomic %;
• a+b+c+d+e+f=100 atomic %;
• M includes Cu;
• Mf is represented by CugM′h, where M′ is at least one element selected from Co, Ni and Zn;
• 78 atomic %≤a≤85 atomic %;
• e≤3 atomic %;
• 0.4 atomic %≤g<0.7 atomic %;
• and
• f=g+h.