In the region of dipole-dipole interaction, we investigate magnetostatic guided modes in a rectangular magnetic wire. The analytical dispersion relation is obtained.

在磁偶极相互作用区域内，我们研究了一个矩型磁性线中的静磁波导模式，解析的色散关系被求出。

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Creating a magnetic field using electricity is easy: an electric current flowing in a wire generates a magnetic field around that wire.

用电流产生磁场容易：当电流在金属线圈流动时，磁场也随之产生。

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Well,a small change in plans.If you actually have a varying magnetic field that passes through that wire then that will actually generate voltage in it.

这和以前不同了，如果存在一个变化的磁场,穿过金属线圈,线圈内就会产生一个电压。

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Creating a magnetic field using electricity is easy: an electric current flowing in a wire generates a magnetic field around that wire.

ECONOMIST: Recreating the planet's magnetic field in a laboratory

Note that an American, Oberlin Smith, described how magnetic recording could be done on magnetic impregnated thread or steel wire in 1888.

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These impurities help tame the magnetic fields caused by current inside the wire, increasing its capacity.

ECONOMIST: Inside story