Do artifacts have summoning sickness?

Although all permanents experience Summoning Sickness, only Creatures, Artifact Creatures, Land Creatures, planeswalker creatures and Enchantment Creatures (or Land, Artifacts, planeswalkers or Enchantments that have become creatures) are affected by Summoning Sickness.

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Do artifacts stay on the field MTG?

Artifact creatures behave just like other creatures in that they can't attack or use abilities the turn they hit the battlefield, unless they have haste. An Equipment stays on the battlefield when not attached to a creature. What happens if you copy an aura? If Mirage Mirror becomes a copy of an Aura, it's put into its owner's graveyard unless it's somehow attached to an appropriate object or player already. If it becomes a copy of an Equipment and is attached to a creature, it'll become unattached when it becomes a non-Equipment artifact again.

Also, are auras permanents mtg?

Auras are indeed permanent cards. The only card types that do not count as permanent cards are instant and sorcery. Accordingly, who owns auras mtg? By default, the player who put it onto the battlefield controls it. Control of the Enchanted permanent does not dictate who controls the Aura. 303.4e An Aura's controller is separate from the enchanted object's controller or the enchanted player; the two need not be the same.

Are all enchantments auras?

Aura and Enchantment are not synonyms. If you look at any Aura card, such as Rancor, you will see that the type line says "Enchantment - Aura", which means the type is Enchantment, and the subtype is Aura. This means that Auras are always Enchantments, while Enchantments are not always Auras. Subsequently, can you sacrifice curses mtg? Nope. You can only sacrifice something you control. While their aura may be attached to your creature, they still control the enchantment, not you.