To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. Hard materials have high coercivity, whereas soft materials have low coercivity.aterials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone.
Atahualpa was the last Inca ruler, executed by Spanish conquistador Francisco Pizarro in 1533, marking the end of the Inca empire.orn c. 1502, Atahualpa was the younger son of Inca ruler Huayna Capac. At Huayna's death, the kingdom was divided between his sons. This lead to a bloody civil war, which Atahualpa won in 1532.
In early 1532 Huascar huÃ¡scar was defeated and captured And atahualpa was lord of The. Andes pizarro and The: Spanish Francisco pizarro was a seasoned soldier and conquistador who had played a large role in the conquest and exploration Of. panamatahualpa and the Inca Empire in 1532: Atahualpa was the reigning Inca (a word similar in meaning to King or Emperor) of the Inca Empire, which stretched from present-day Colombia into parts of Chile.