Minimization of thermal magnetoresistive offset change

An apparatus comprising:

• a first disk drive component comprising a first material with a first CTE (“coefficient of thermal expansion”), the first material comprising aluminum and comprising silicon, carbon, carbide, boride, aluminum-molybdenum, aluminum-beryllium, aluminum-germanium, aluminum-molybdenum-titanium, aluminum-germanium-silicon, aluminum-silicon-bronze, aluminum-silicon-magnesium-copper-nickel, or nitride and boron;
• and
• a second disk drive component comprising a second material with a second CTE, wherein
• the second disk drive component is connected to the first disk drive component and includes a different composition than the first disk drive component, and
• the first disk drive component and the second disk drive component produce an adjacent track erasure of less than 10% on a recording medium between 0° C. and 60° C.

An apparatus comprising:

• a disk drive base comprising an aluminum composition with a first CTE (“coefficient of thermal expansion”);
• a reader and a writer rotatable with respect to the disk drive base, wherein a separation between the reader and the writer affects an MR (“magnetoresistive”) offset;
• a disk drive cover attached to the disk drive base and comprising a stainless steel composition with a second CTE that is different from the first CTE,
• wherein, in response to temperature changes between 0° C. and 60° C., the aluminum composition and the stainless-steel composition expand and contract in equal or substantially equal proportion.