PanMag

Database for Permanent Magnetic Alloys

• thermodynamic

PanMag

PanMag Quick Overview

PanMag – newly developed thermodynamic database for exploring rare-earth permanent magnetic materials.

• The stabilities and properties of the magnetic phase (Nd₂Fe₁₄B based T₁ phase) are carefully assessed. It can be used to predict the phase equilibria, solidification, and magnetic properties, such as Curie temperature, saturation magnetization (B_s) and magnetocrystalline anisotropy field (H_A) of the magnetic materials.
• A total of 141 phases are included in the current database.
• A total of 57 binaries and 28 constituent ternaries have been critically assessed.

Applications

Calculated heat capacity of the T₁-Nd₂Fe₁₄B phase with experimental data

The most important T₁-RE₂M₁₄B phase is described using a 3-sublattice model: (Dy,Nd,Pr,Tb)_0.11764(Al,Co,Fe)_0.82354B_0.05882 in this thermodynamic database, where RE represents rare earth elements: Dy, Nd, Pr, and Tb. M represents metal elements: Al, Co, and Fe. This figure shows the calculated heat capacity of the T₁-Nd₂Fe₁₄B phase which is in good agreement with the experimental data. The heat capacity peak at Curie temperature is properly simulated.

This figure shows the calculated Curie temperature of the T₁-Nd₂(Co_xFe_1-x)₁₄B as a function of Co composition in the second sublattice, which accords to the experimental data very well. A clear trend is shown that replacing Fe with Co results in the increase of Curie temperature for the T₁ phase.

Comparison between the calculated and experimentally measured Curie temperatures for T₁-Nd₂(Co_xFe_1-x)₁₄B alloy