A common observation seen in $ Fe_3O_4 $ is that it is ferrimagnetic at room temperature but at $ 850 \,K $ it becomes
- diamagnetic
- paramagnetic
- ferromagnetic
- non-magnetic
The Correct Option is B
Solution and Explanation
The correct option is(B): paramagnetic.
At \(850\,K, Fe_{3}O_{4}\) becomes paramagnetic.
the transition of Fe3O4 from being ferrimagnetic at room temperature to paramagnetic at 850 K is a consequence of its Curie temperature. Below Tc, it exhibits ferrimagnetism due to the alignment of magnetic moments, while above Tc, thermal energy disrupts this alignment, and it becomes paramagnetic with no net magnetization. This transition in magnetic behavior is a well-known property of magnetic materials and is governed by their temperature-dependent magnetic properties.
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Concepts Used:
Solid State
Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions.
Types of Solids:
Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;
- Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
- Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.