829 research outputs found
Short-range antiferromagnetic correlations in Kondo insulators
We study the influence of short range antiferromagnetic correlations between
local -electrons on the transport and thermodynamic properties of Kondo
insulators, as first proposed by Coqblin et al. for metallic heavy fermions.
The inter-site magnetic correlations produce an effective bandwidth for the
-electrons. They are treated on the same footing as the local Kondo
correlations such that two energy scales appear in our approach. We discuss the
competition between these two scales on the physical properties.Comment: 13 pages, 13 figures. To be published in Physics Letters
Giant Magnetoelectric Effect in a Multiferroic Material with a High Ferroelectric Transition Temperature
We present a unique example of giant magnetoelectric effect in a conventional
multiferroic HoMnO3, where polarization is very large (~56 mC/m2) and the
ferroelectric transition temperature is higher than the magnetic ordering
temperature by an order. We attribute the uniqueness of the giant
magnetoelectric effect to the ferroelectricity induced entirely by the
off-center displacement of rare earth ions with large magnetic moments. This
finding suggests a new avenue to design multiferroics with large polarization
and higher ferroelectric transition temperature as well as large
magnetoelectric effects
Drinking in pregnancy: poor guidelines or lack of evidence?
Each year Bournemouth University (BU) holds a Festival of Learning (FoL), a week-long series of events aimed at encouraging members of the public, academics and healthcare professionals to engage with BU’s current science and research projects. This year BU’s Centre for Midwifery, Maternal and Perinatal Health (CMMPH) resumed the tradition of holding a debate during the festival on a topic relevant to maternal health and childbirth. In 2016 the FoL debate took place at the end of June and focused on the motion: " Advising pregnant women to avoid drinking alcohol during pregnancy is a symptom of the Nanny State and another step towards the medicalisation of childbirth.
Anomalous Paramagnetic Effects in the Mixed State of LuNi2B2C
Anomalous paramagnetic effects in dc magnetization were observed in the mixed
state of LuNi2B2C, unlike any reported previously. It appears as a kink-like
feature for H > 30 kOe and becomes more prominent with increasing field. A
specific heat jump at the corresponding temperature suggests that the anomaly
is due to a true bulk transition. A magnetic flux transition from a square to
an hexagonal lattice is consistent with the anomaly.Comment: 5 pages, 4 figure
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