Science project Essay Example | Topics and Well Written Essays - 750 words

Science project - Essay ExampleTo understand that, we first-year need to understand what makes such materials into magnets.At the atomic level, materials that exhibit strong magnetic susceptibility save unpaired electrons in their electronic shells. These unpaired electrons all have a certain spin perplexity associated with them. Due to this spin, and the revolution of electrons around the nucleus, electrons generate their own magnetism. As all the electrons spin in the comparable direction for a certain nucleus, their magnetic field directions ar also the same. So these magnetic field add up and give the whole atom a net magnetic field (Mohammad et al., 2003 Rajendran, 2004).When these atoms are subjected to a magnetic field, they align themselves with the applied magnetic field. When the magnetic field is removed, some of these atoms remain reorient with the magnetic field. These regions where the magnetic field of the atoms is aligned in the same direction are known as domai ns (Saleemi et al, 2002). For ferromagnetic materials, a net magnetic field is always present. The maximum magnetism that a ferromagnetic material may retain in the absence of an external magnetic field is known as its saturation magnetization. This is an important property which changes when we change the temperature of the magnetic material (Callister, 2007).There is an important factor which dictates the facility with which atoms align with each other to form domains under the effect of an external magnetic field the caloric agitation of the atoms. Atoms vibrate and have energy associated with their vibration. This vibration increases as the temperature of the material increases. As the atomic vibration/agitation increases, it becomes harder for these atoms to be forced to be aligned in a certain direction, and vice versa. So, if we maintain the same amount of external energy through a