Magnetic Structure Analysis of Nd-Fe-B Based Nanocomposite Magnets by Electron Holography
Bibliographic record
Abstract
Magnetic flux distribution in Nd-Fe-B based nanocomposite magnets was investigated at nanometer scale by electron holography. Both Nd4.5Fe77B18.5 and Nd-Fe-B-Ti-C, the latter of which was newly developed and commercialized under tradename of SPRAX, are found to consist of hard and soft magnetic grains of 10~30 nm in diameter. Through the comparison of reconstructed phase images of Nd4.5Fe77B18.5 and Nd-Fe-B-Ti-C, it is found that the lines of magnetic flux of Nd-Fe-B-Ti-C fluctuate more largely than Nd4.5Fe77B18.5 in both demagnetized and remanent states. The fluctuation in the distribution of lines of magnetic flux is considered to result from the randomness in the crystal orientation of the hard magnetic grains with high anisotropy. It is also pointed out that the fluctuated distribution of lines of magnetic flux is consistent with the high coercivity and high maximum energy product of Nd-Fe-B-Ti-C.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".