The tetragonal Nd2Fe14B crystal structure has exceptionally high uniaxial magnetocrystalline anisotropy (HA~7 teslas – magnetic field strength H in A/m versus magnetic moment in A.m2). This gives the compound the potential to have high coercivity (i.e., resistance to being demagnetized). The compound also has a high saturation magnetization (Js ~1.6 T or 16 kG) and typically 1.3 teslas. Therefore, as the maximum energy density is proportional to Js2, this magnetic phase has the potential for storing large amounts of magnetic energy (BHmax ~ 512 kJ/m3 or 64 MG·Oe). This property is considerably higher in NdFeB alloys than in samarium cobalt (SmCo) magnets, which were the first type of rare-earth magnet to be commercialized. In practice, the magnetic properties of neodymium magnets depend on the alloy composition, microstructure, and manufacturing technique employed.Physical and Mechanical Characteristics

Parameter	Unit	Standard Data
(Tc) Curie Temperature	°C	310-380
(Tw) Maximum Operating Temperature	°C	80-200
Compression Strength	MPa	950 (137,800 psi)
Tensile Strength	MPa	80 (11,600 psi)
Young’s Modulus	GPa	160 (23,200 psi)
Bending Strength	Mpa	295-345
Hardness	Hv	560-620
(r) Electrical Resistivity	W cm	1.8×10-2.0×10
(D) Density	g/cm	7.50-7.65
(m rec) Recoil Permeability		1.05
(Hs) Magnetization Field Strength	Koe	≥30
	KA/m	≥2400
(aBr) Temp.Coefficient of Br	%/°C	-0.11~-0.12
(aHcj) Temp.Coefficient of Hcj	%/°C	-0.5~-0.

Tags: neodymium magnets Neodymium magnets.NdFeB magnet.N52/N35/N42 Strong magnets Smco magnets