Abstract
Muon Spin Rotation (μSR) results for magnetite (Fe3O4) are analyzed and discussed. At room temperature, a μSR signal is observed due to the presence of an internal magnetic field (Bint) at the muon site. External transverse field measurements show that Bint is parallel to the magnetic spin direction, the direction in zero applied field. Calculations of the hyperfine field to pinpoint muon stopping sites in magnetite show that the local field contains supertransfer (covalent) and dipolar field contributions. The implanted muons appear to stop at sites structurally similar to those reported for hematite (α-Fe3O4), where muon-oxygen bond formation was strongly indicated.
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