Model Description
The magnet Curie temperature (Tc [K]) predictor model has been trained using a supervised learning approach on a specific set of magnet classes having 14:2:1 phases.
The dataset to train the Tc prediction model is a distinct literature source.
Further, the Tc values for various 14:2:1 magnet phases at room temperature are considered for dataset creation.
It predicts the Tc value using the chemical composition as a feature.
E.g: To predict the Tc value Nd2Fe14B1 magnet composition, the features are Nd=2, Fe=14, and B=1.
Application & Limitations
Input feature as the chemical composition of the test sample should match the sequence of the features described in the config file.
The trained model is valid for 14:2:1 phases only, which are stoichiometric compositions and the predicted Tc value is in Kelvin and at room temperature.
Model pipeline
The voting regressor to predict the Tc combines the following four base models and equal weight is assigned to each base model.
- Extra tree regressor (ET)
- Extreme gradient boosting (XGB)
- Random forest regressor (RF)
- Adaptive boosted RF regressor (AB)
How to use the trained model for inference
1import json
2import joblib
3import pandas as pd
4
5Tc_predictor = joblib.load('Magnet_Tc_predictor.joblib') # trained model
6config = json.load(open('config.json'))
7features = config['features'] # feature vector
8
9#data = pd.read_excel("data.xlsx") # read test file with new compositions
10data = data[features]
11
12Predicted_value = Tc_predictor.predict(data) # predict Tc values
13print("Predicted Tc value is: {0:.2f}'.format(Predicted_value)")
14
