Antiferromagnets are materials where adjacent magnetic moments, or spins, align in opposite directions. This results in a net magnetic moment of zero, even though the individual spins are ordered. They typically exhibit this behavior at low temperatures, where thermal energy is insufficient to disrupt the alignment. These materials are important in various applications, including spintronics and magnetic storage devices. Antiferromagnetic order can be disrupted by external magnetic fields or temperature changes, leading to phase transitions. Understanding antiferromagnets helps researchers develop new technologies that utilize their unique magnetic properties.