| Literature DB >> 19729619 |
T Fennell1, P P Deen, A R Wildes, K Schmalzl, D Prabhakaran, A T Boothroyd, R J Aldus, D F McMorrow, S T Bramwell.
Abstract
Spin-ice materials are magnetic substances in which the spin directions map onto hydrogen positions in water ice. Their low-temperature magnetic state has been predicted to be a phase that obeys a Gauss' law and supports magnetic monopole excitations: in short, a Coulomb phase. We used polarized neutron scattering to show that the spin-ice material Ho2Ti2O7 exhibits an almost perfect Coulomb phase. Our result proves the existence of such phases in magnetic materials and strongly supports the magnetic monopole theory of spin ice.Entities:
Year: 2009 PMID： 19729619 DOI： 10.1126/science.1177582
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728