Year: 2010
Type: article
Abstract: Compressed Fe 3 O 4 powder and Fe sheet were pre-heated to various temperatures higher than 300 °C in a microwave magnetic field ( h rf ). Then an external static magnetic field ( H ext ) was imposed perpendicularly to h rf and the temperature increased (Δ T : temperature difference from the pre-heated temperature, Δ T max : ∼200 °C (Fe), ∼50 °C(Fe 3 O 4 )). It had a peak at almost the same H ext during ascent and descent of H ext because of ferromagnetic resonance (FMR). In fact, Δ T became smaller as the preheating temperature was raised to approach the Curie temperature, and H ext corresponding to the temperature peak shifted higher. This report provides FMR heating data under various conditions with quantitative discussion and proposes application of a new heat treatment to materials.
Authors: Noboru Yoshikawa, Tomotsugu Kato
Institution: Tohoku University
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
Award: G2343416831
OpenAlex ID: W2054528366