Patent ID: 7042758

Claim:
A magnetic cell comprising: a lower electrode; an electrically conductive pillar formed on the lower electrode; a magnetoresistance effect film having at least two ferromagnetic layers formed on the electrically conductive pillar and an intermediate layer provided between the ferromagnetic layers; an upper electrode formed on the magnetoresistance effect film; a support layer formed from at least one metal directly on a side face of the electrically conductive pillar or via an insulating layer; and a current diffusion preventing layer provided between the support layer and the lower electrode, a height of the electrically conductive pillar, a thickness of the current diffusion preventing layer, and a thickness of the support layer satisfying relationships of h > t1 + t2 > 30 30 + L × h where h represents the height of the electrically conductive pillar, t 1 represents the thickness of the current diffusion preventing layer, t 2 represents the thickness of the support layer, and L (nm) represents a length of a short side of the electrically conductive pillar.