One solution employs a ferromagnetic metal to inject a spin - polarized current into a semiconductor 解决这种问题的办法是，利用铁磁金属将自旋偏极化的电流注入半导体内。
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Researchers must answer several major questions before the second category of devices can take off as a viable industry : can we devise economic ways to combine ferromagnetic metals and semiconductors in integrated circuits 为了让第二类自旋电子元件工业起飞，成为实际的产业，研究人员必须先回答下列几个主要问题：是否能想出较经济的方法，在积体电路中结合铁磁金属和半导体？
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The gmr effect has became a international researching hotspot after the discovery of gmr effect of fe / cr multilayers . people found that multilayers formed by ferromagnetic metal of transition family and nonmagnetic metal or by alloy film and nonmagnetic metal will take on gmr effect . the value of gmr of co / cu multilayers is the biggest which can reach 65 % under room temperature 继fe / cr多层膜巨磁电阻效应发现以后，巨磁电阻效应已成为国际研究的热点，人们发现过渡族铁磁金属或合金薄膜与非磁性金属构成多层膜后均可呈现巨磁电阻效应，其中以co / cu多层膜的gmr值最高，室温巨磁电阻效应可达65 % 。
