"in memory of" or "in memorial of"?

Hi, everyone. I have a question that google alone could not help me. I want to ask about the difference between "in memory of" and "in memorial of". I know "memorial" is also a noun and it has different meanings with "memory". But no matter how many times google, I still could get it, whether "in memorial of" is a wrong usage or not. They still use that phrase, not as "in memory of", but... it seems that "in memorial of" is still available somehow. Help me please, thanks a lot.