A sputtering target of platinum-cobalt alloy is disclosed which contains 10 to 55% by weight of platinum; 1 to 15% by weight of a first additional element selected from the group consisting of nickel and tantalum; no more than 1.5% by weight of a second additional element selected from the group consisting of boron, titanium, lanthanum, cerium, neodymium, beryllium, calcium, zirconium, and silicon; no more than 20% by weight of chromium; and balance cobalt. A method for manufacturing the sputtering target is also disclosed. In the method, a platinum-cobalt alloy containing specific ingredients in predetermined amounts is first prepared. Then, the platinum-cobalt alloy is subjected to hot plastic working with a thickness reduction of no less than 30%. Subsequently, the alloy thus hot worked is subjected to a cold plastic working with a thickness reduction of no less than 5% at a temperature less than the recrystallization temperature of the alloy. Read More
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