Ferromagnetic minerals such as magnetite also can carry a remanent magnetization or remanence. The information these domains represent is commonly called magnetic remanence or remanent magnetization. It is called the "initial remanence" or the "isothermal remanent magnetization (IRM)". Another kind of laboratory remanence is "anhysteretic remanence" or "anhysteretic remanent magnetization (ARM)". This remanent magnetization, or "remanence", can be acquired in more than one way. Magnetic tape can degrade from binder hydrolysis or magnetic remanence decay. Proper degaussing will ensure there is insufficient magnetic remanence to reconstruct the data. Sometimes the term retentivity is used for remanence measured in units of magnetic flux density. By accessing the entire hard drive, data erasure eliminates the risk of data remanence. Instead the parameter that is listed is residual flux density (or remanence), denoted formula 17. Often particles are considered single-domain if their saturation remanence is consistent with the single-domain state. Neodymium magnets, for example, have a remanence approximately equal to 1.3 teslas. This is like an electrical version of magnetic remanence. Encrypting data before it is stored on the media may mitigate concerns about data remanence. Often a single measure of remanence does not provide adequate information on a magnet.