Influence of Preferred Orientation on the Hall Effect in Titanium

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Abstract
The effect of preferred orientation on the Hall effect in titanium was examined in an attempt to resolve the inconsistent results of previous investigators. Three specimens of iodide titanium were prepared with different textures and the Hall coefficient of each was measured between 4.2° and 295°K. The Hall coefficient was found to depend on both temperature and preferred orientation. At room temperature, it was determined to be −1.8×10−11m3/C in two specimens and +1.2×10−11m3/C in a third one. From the x‐ray analysis of the texture and the Hall coefficient data, it was concluded that the positive component of the Hall coefficient was associated with the hexagonal axis of titanium, being parallel to the magnetic field. An approximate calculation estimated the principal components of the Hall tensor to be R∥ = +4.2×10−11 and R⊥ = −7.7×10m3/C, where R∥ is the Hall coefficient when the magnetic field is parallel to the c axis and R⊥ the Hall coefficient when the magnetic field is perpendicular to the c axis. The values of R∥ and R⊥ given above can account for the spectrum of previously published Hall values for titanium.