Prime Minister’s Meeting with Prime Minister of Norway
Prime Minister’s Meeting
with Prime Minister of Norway
Prime Minister Shri
Narendra Modi met H.E. Mr. Jonas Gahr Store, Prime Minister of Norway, in
Copenhagen on the sidelines of the 2nd India Nordic Summit. This was the first
meeting between the two leaders since the assumption of office by Prime
Minister Store in October 2021.
Why is it in news?
Both Prime Ministers reviewed the
ongoing activities in bilateral relations and discussed future areas of
cooperation. Prime Minister highlighted that Norway's skills and
India's scope provided natural complementarities. Both leaders discussed the
potential for deepening engagement in areas like Blue Economy, renewable
energy, green hydrogen, solar and wind projects, green shipping, fisheries,
water management, rainwater harvesting, space cooperation, long term
Infrastructure investment, health and culture.
Highlights
Discussions also took
place on regional and global developments. As members of UNSC, India and Norway
have been engaging with each other in the UN on global issues of mutual
interest.
Queen Margrethe II of Denmark Welcomes Prime Minister
Queen Margrethe II of
Denmark Welcomes Prime Minister
Her Majesty Queen Margrethe II of
Denmark received Prime Minister Shri Narendra Modi today at the historic
Amalienborg Palace in Copenhagen.
Why
is it in news?
Prime Minister felicitated Her Majesty on the occasion of the Golden Jubilee of
her accession to the throne of Denmark.
Highlights
Prime Minister briefed her on the
increasing momentum in India - Denmark ties in recent years, particularly the
Green Strategic Partnership. He also lauded the role of the Danish Royal Family
in furthering social causes. Prime Minister thanked Her Majesty for the warm
reception and hospitality extended to him.
Researchers find ways for broader design & engineering of reconfigurable magnonic crystals that can transfer information more efficiently than electrons
Researchers find ways for broader design & engineering
of reconfigurable magnonic crystals that can transfer information more
efficiently than electrons
Sometime in the future, magnons may
replace electrons as carriers of our thoughts and commands more efficiently.
Researchers have found ways for broader design and engineering of
reconfigurable functional magnonic crystals, which can show the way for magnon
based computing systems and bring about a paradigm shift in computing and
communication devices.
Why is it in news?
Electrons, the lightest known
particles, almost two thousand times lighter than the proton, are carriers of
information in all “electronic” devices. As the electrons drift in the
semiconducting device of the CPU, the signal moves almost at the speed of
light. However, this drift generates heat in the device, which has to be fanned
out of the CPU.
Highlights
·
Scientists around
the world are thus looking for materials in which magnetic spin waves can be
used to transport information without generation of heat. Magnons are particle avatars of spin waves which can ripple
through a lattice of tiny ferromagnetic particles of nano dimensions. Since
magnons are quasiparticles, their movement through the material does not
generate any heat. The promise held by magnons has led to magnonics, a budding
research field in nanoscience that deals with the excitation, propagation,
control and detection of magnons or spin waves through periodic magnetic media.
·
Research scientists at the
Spintronics & Spin Dynamics Lab at the S.N Bose National Centre for Basic
Sciences, an autonomous institute of the Department of Science and Technology,
have recently merged magnonics with “Artificial Spin Ice”, creating ways for
broader design and engineering of reconfigurable functional magnonic crystals.
Artificial spin ice or ASI are metamaterials made up of coupled nanomagnets
arranged on different lattices. The tag ‘ice’ comes from the similarity in molecular
structure with tetrahedron shaped ice crystals in which two hydrogen atoms are
close to the central oxygen atom, and two are far. The spin ice material, too,
is made of corner linked tetrahedra. Each vertex of the tetrahedron is a
magnetic ion which has a magnetic moment. In their low energy state, they
follow a two in–two out arrangement.
·
Artificial spin ice (ASI) systems
replicate the principles of the spin ice systems. According to the scientists,
“The successful use of ASI as a functional magnonic crystal will depend upon
the efficient reconfigurability of their magnetic microstates and the ensuing
spin-wave properties.” This precisely is the crux of their research.
·
Using an experimental set-up
developed in house, the S. N. Bose Centre scientists are studying the samples
through Brillouin light scattering (BLS). BLS is an inelastic light scattering
phenomenon of light quanta photons from quasiparticles like magnons or phonons,
which can help in understanding spin-wave propagation and dispersion under the
influence of an external magnetic field. Earlier experiments had mainly used
the ferromagnetic resonance technique (FMR), which helped in studying the
global or large-scale behaviour of ASI. Hence, the BLS method is a breakaway
from the earlier experimental methods. Experimental observations using BLS are
consolidated and extrapolated through simulations.
·
Their studies published in ACS
Publications show that the ASI systems can potentially give rise to a huge
variety of magnetic microstates, which can be globally or locally controlled by
a magnetic field. This would lead to the effective formation of different
magnonic crystals by subtle changes in the external magnetic field, more like
origami or a kaleidoscope. Therefore, different functions of magnonic circuit
components can be performed in the same active element or magnonic crystal only
by externally tuning a modest magnetic field, saving huge cost and energy.
