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目前,在地球物理文献及教科书中,多以H、Z、T符号表示磁场的参量,其量纲用高斯单位制。众所周知,磁性介质中之场强,是以B(磁感强度或磁通密度)表示,其量纲用有理化实用单位制,或非有理化高斯单位制。 本文从格林(Green)定理出发,推出全空间介质中某点磁位Φ表示式,从而引出偶极位、无限长线极位,以及磁矩的表示式,并以Bh、Bz及Bt代替H、Z及T。分析讨论了均匀磁化条件下,几个规则磁性体的△Bh、△Bz、及△Bt表示式。将其相对应的△Bh、△H;△Bz、△Z等关系式,作了简单的分析比较。
At present, in geophysical literature and textbooks, the parameters of magnetic field are mostly represented by H, Z and T symbols, and their dimensions are expressed in Gaussian units. It is well known that the field strength in a magnetic medium is represented by B (magnetic induction or magnetic flux density) and its dimensions are expressed in units of physical and chemical properties or in units of non-physical Gaussian units. Starting from Green’s theorem, this paper presents a point-like representation of the magnetic potential Φ in a full space medium, which leads to the dipole position, the infinite line polar position, and the expression of magnetic moment, with Bh, Bz and Bt instead of H, Z and T. The expressions of △ Bh, △ Bz and △ Bt of several regular magnetic bodies under the condition of uniform magnetization are analyzed and discussed. The corresponding △ Bh, △ H; △ Bz, △ Z and other relations, made a simple analysis and comparison.