27 Aug 2009
Observation of Magnetic Monopoles in Spin Ice
Taku J. Sato,
Jeffrey W. Lynn,
Department of Physics, Tokyo Metropolitan University,
Hachioji-shi, Tokyo 192-0397, Japan.
Department of Materials Science and Engineering, Kyoto University,
Kyoto 606-8501, Japan.
NSL, Institute for Solid State Physics, University of Tokyo,
Tokai, Ibaraki 319-1106, Japan.
NIST Center for Neutron Research, National Institute of Standards and Technology,
Gaithersburg, Maryland 20899-6102, USA.
Department of Electronics, Faculty of Engineering, Kyushu Institute of Technology,
Kitakyushu 804-8550, Japan.
Institute for Solid State Physics, University of Tokyo,
Kashiwa 277-8581, Japan.
To whom correspondence should be addressed. E-mail: email@example.com
International Conference on Neutron Scattering 2009 (May 7, 2009; ICNS2009 C9.2)
From the symmetry of Maxwell’s equations of electromagnetism as well as
field theoretical arguments, magnetic charges or monopoles would be expected
to exist. But magnetic monopoles have never been observed despite longstand-
ing experimental searches. Recently, attention has turned to condensed matter
systems where tractable analogs of magnetic monopoles might be found, and
one prediction is for an emergent elementary excitation in the spin ice com-
pound, where the strongly competing magnetic interactions exhibit the same