摘要：石墨烯具有许多理想的性能，磁特性并不是其中之一。石墨烯的磁特性可以通过添加具有磁特性的物质来实现。但这会破坏石墨烯的电子性能。现在物理学家发现了一种既可以实现石墨烯磁特性又不破坏其电子性能的方法。他们通过将石墨片近距离的靠近磁绝缘体（即一种具有电磁特性的电绝缘体）来完成。

Summary：Graphenehas many desirable properties. Magnetism alas is not one of them. Magnetism canbe induced in graphene by doping it with magnetic impurities, but this tends todisrupt graphene's electronic properties. Now physicists have found a way toinduce magnetism in graphene while also preserving graphene's electronicproperties. They have accomplished this by bringing a graphene sheet very closeto a magnetic insulator -- an electrical insulator with magnetic properties.

石墨烯是排列在六方晶格中的碳原子组成的一个原子厚度的石墨片，具有许多理想的性能。磁特性并不属于其中之一，石墨烯的磁特性可以通过掺杂其他具有磁特性的物质来实现，但这种方法会破坏石墨烯的电子特性。

Graphene, a one-atom thick sheet of carbonatoms arranged in a hexagonal lattice, has many desirable properties. Magnetismalas is not one of them. Magnetism can be induced in graphene by doping it withmagnetic impurities, but this doping tends to disrupt graphene's electronicproperties.

现在加州大学河滨分校的物理学家的团队发现了一个具有独创性的方法，通过将石墨片近距离的靠近磁绝缘体（一种具有电磁特性的电绝缘体）来实现石墨烯的电磁特性，同时又不破坏其电子性能。

Now a team of physicists at the Universityof California, Riverside has found an ingenious way to induce magnetism ingraphene while also preserving graphene's electronic properties. They haveaccomplished this by bringing a graphene sheet very close to a magneticinsulator -- an electrical insulator with magnetic properties.

物理学和天文学的教授石敬说“这是第一次通过这种方法来实现石墨烯的磁特性，”他的实验室主导了这项研究。“磁性石墨烯获得了新的电子性能，也就引起了新的量子现象，这些新的性能有利于开发新的，更加稳健的多功能的电子设备.

"This is the first time that graphenehas been made magnetic this way," said Jing Shi, a professor of physicsand astronomy, whose lab led the research. "The magnetic graphene acquiresnew electronic properties so that new quantum phenomena can arise. Theseproperties can lead to new electronic devices that are morerobust and multi-functional."

因为电脑芯片是通过电子自旋来存储数据的，这些发现有利于增加石墨烯在电脑方面的应用。

The finding has the potential to increasegraphene's use in computers, as in computer chips that use electronic spin tostore data.

研究成果在这个月初已经被物理评论快报在网上出版.

Study results appeared online earlier thismonth in Physical Review Letters.

石教授和他的团队用的磁绝缘体是在实验室里利用激光分子束外延法生长的钇铁石榴石。研究人员利用原子能将单层石墨烯片放置在光滑的钇铁石榴石片上。他们发现钇铁石榴石会使得石墨烯磁化。也就是说，石墨烯从钇铁石榴石里直接的借来了磁特性。

The magnetic insulator Shi and his team usedwas yttrium iron garnet grown by laser molecular beam epitaxy in his lab. Theresearchers placed a single-layer graphene sheet on an atomically smooth layerof yttrium iron garnet. They found that yttrium iron garnet magnetized thegraphene sheet. In other words, graphene simply borrows the magnetic propertiesfrom yttrium iron garnet.

磁性物质，比如说铁，会干扰石墨烯的电传导。研究人员为了避开了这些干扰而选择了钇铁石榴石，因为钇铁石榴石就像一种电绝缘体，这也意味着它不会干涉石墨烯的电子传输性。不是通过掺杂的方法，而是通过简单的将石墨烯贴近钇铁石榴石，就保留了石墨烯优异的电子传输性能。

Magnetic substances like iron tend tointerfere with graphene's electrical conduction. The researchers avoided thosesubstances and chose yttrium iron garnet because they knew it worked as anelectric insulator, which meant that it would not disrupt graphene's electricaltransport properties. By not doping the graphene sheet but simply placing it onthe layer of yttrium iron garnet, they ensured that graphene's excellentelectrical transport properties remained unchanged.

在他们的实验中，石教授和他的团队将石墨烯放在外部磁场的环境下。他们发现石墨烯的霍尔电压（即垂直方向的电压电流）与钇铁石榴石呈线性相关，即大家所知的反霍尔效应，这可以在诸如铁、钴等磁性材料中见到。这证实了他们的石墨烯片已经具有磁特性。

In their experiments, Shi and his teamexposed the graphene to an external magnetic field. They found that graphene'sHall voltage -- a voltage in the perpendicular direction to the current flow --depended linearly on the magnetization of yttrium iron garnet (a phenomenonknown as the anomalous Hall effect, seen in magnetic materials like iron andcobalt). This confirmed that their graphene sheet had turned magnetic.

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