If you feel threatened right now, call 911. The police can provide immediate assistance. You can also seek an order of protection. An order of protection can be requested at any municipal court in Arizona. You will need to file a sworn statement telling the judge about the domestic violence you have witnessed and/or experienced.
The more specific you can be, the better. If a judge grants an order of protection, the offending spouse cannot have contact with you or anyone else listed on the order of protection. Children can be included in the order of protection.