190554
The commercial neodymium iron boron magnets have the coercivity of 1000-2000 kA/m , and the remanent magnetization is 1.2-1 .4 T. But for a soft magnetic material , such as iron cobalt alloy , the saturation magnetization can achieve 2.4 T. The exchange spring magnet takes the advantage of the soft magnetic material and obtain the high energy density .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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