what type of bacteria can produce iron?

There are classes of bacteria that reduce iron oxides to soluble iron. I think that's what you're referring to, since nothing but stars "produce" iron - it's an element, not a compound. They're commonly called iron-reducing bacteria. I don't know of a specific genus or species.

Some types of magnetotactic bacteria can produce magnetite even in anaerobic and it contains and produces certain amounts of iron .

no bacteria produce iron. iron is an element and therefore cannot be produced.

"Iron bacteria" are chemosynthetic organisms that get their energy by oxidizing dissolved ferrous iron in water. They produce ferric oxide as a waste (they don't produce iron).