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Alnico is considered a stock magnet, which is a commonly used type of permanent magnet. Alnico retains its magnetic properties for a long time, which is why it is considered a permanent magnet.   Alnico magnets have excellent temperature stability and can perform in high temperatures.  Alnico can be used in a service temperature up to 425? – 525? C. The fact that Alnico magnets can be used in such high temperature settings make them extremely useful in industrial and manufacturing industries.  Alnico is affordable and easily customized to the size and strength you need. There are numerous benefits to alnico magnets such as the resistance of high temperatures, ability to maintain magnetic qualities, strength and affordability.  Alnico magnets are great choices for a number of purposes including industrial or consumer applications.
Ceramic magnets, also known as ceramic ferrite or ferrite magnets are extremely popular.  Contributing to the popularity of ferrite magnets is their affordability and ability to maintain their magnetic qualities for long periods of time. The materials required to manufacture ceramic ferrite magnets are easily available at low costs, and these magnets keep their magnetic qualities for a long period of time (which is why they are known as a permanent magnet), making them ideal to be used in a number of industries, at work, at home and in your garage or shop. Containing iron oxide and ceramic, ceramic magnets are made using a chemical compound.  They are made from pressing and sintering mixtures of ceramic and magnetic powders. Ferrite magnets are hard and brittle.  Sintering is used to make solid objects out of powder.  Sintering is completed by heating the powder in a furnace until the particle stick to each other (but don’t melt)..  
Neodymium is the most commonly used of the rare earth magnets because of its strength and affordability.  Rare earth magnets generally are strong and are permanent magnets, which means they hold their magnetism for a long period of time.  Developed in the 1970s and 1980s, rare earth magnets are the strongest type of permanent magnet that is made.  Rare earth magnets are normally made of rare earth elements like cobalt, nickel and iron.  Rare earth magnets often have a plating or coating applied to them to protect them from chipping or cracking since they are so brittle and more vulnerable to corrosion.  The two types of rare earth magnets are Neodymium and Samarium-cobalt.  Neodymium is the strongest of all permanent magnets, including samarium-cobalt, alnico and ferrite.  The term rare earth magnet makes it sound like neodymium magnets are made from materials that are unique and hard to find, which is very misleading because the fact is that the elements that comprise these magnets are easily found, which is why neodymium is affordable. You will find neodymium magnets used in a number of different applications like the industrial, health, security, mechanics and electronics fields.  
A powerful type of magnetic strip is a high energy strip magnet which has a nitrile rubber base.  The amount of magnetic energy stored in a magnet is measured using MGOe.  High energy strip magnets are more powerful than normal flexible magnetic strips and are available in 1.1 – 1.6 MGOe.  Available in many different shapes and sizes magnetic strips are often laminated and have adhesive backing.  Flexible magnetic strips truly are versatile.  They will stick to any ferrous surface, can be cut to length, are available in a number of widths and are ideal for punching and laminating.  Magnetic tape has a variety of uses in school, work and around the home.  Magnetic tape is really useful – on the front is an adhesive face and the back has a magnetic face.  Magnetic tape is thin, flexible, versatile and affordable, which makes it useful for a number of applications.  
Their durability makes block magnet a common industrial favourite.  Depending on your needs, the composition you choose for your block magnet will differ. You should consider the purpose and conditions you will use the magnet for before you choose the type of block magnet to use. You should use a rare earth magnet instead of an alnico or ferrite magnet if you are looking for a magnet for heavy duty or industrial use.  When you make a decision about a magnet you should take the strength needed and the temperatures the magnet will be used in into account. Depending on the need of magnet choose one that is difficult or easy to demagnetize.