To clarify: You can't sue a magistrate for issuing a warrant, but you can sue the state for damages incurred as a result of a falsely issued warrant; the magistrate is acting as an agent for the state, and so ultimate responsibility rests with them.

However, if the warrant was issued on the strength of your husband's false statement, you may not be able to win a case against the state because they had evidence in the form of your husband's word which they reasonably believed was truthful. In that case, you can definitely sue your husband.

You should definitely see an attorney either way; preferably one who can handle both the divorce and the damages from the arrest, as a suit against your husband for the false police report can give you leverage in the divorce, and having a single attorney makes it easier to, for example, negotiate an agreement to drop the suit in exchange for an especially favourable settlement to the divorce although even with two attorneys your case should be well-handled as long as you advise each of the situation with the other. While only your attorney can give you legal advice as to the best way to proceed, I can speculate that (s)he might recommend suing both the state and your husband, since filing a lawsuit gives you discovery rights, and then dropping the claim against one defendant and proceeding against the other based on the information obtained during discovery.