Angular distribution of particles sputtered from nickel single- and polycrystalline targets in the vicinity of the Curie point

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Abstract

Angular distributions of particles sputtered from polycrystalline Ni and from (001) Ni single crystals have been obtained for target temperatures ranging from 50 to 430°C. The most substantial variations have been found to occur at the Curie temperature TC. In the case of polycrystalline Ni the angular distribution of sputtered particles widens at TC (i.e., the fraction of particles sputtered along the surface normal decreases) compared with T < Tc and T >TC. In the case of Ni single crystals an anomaly has been found in the Wehner spot pattern at TC, namely the 〈110〉 spots become strongly extended in the (100) plane and their centers are shifted towards the surface normal.

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