State-of-the-art in Caloric materials

Too cool to work.
Xavier Moya, Emmanuel Defay, Volker Heine and Neil D. Mathur

Nature Physics 11, 202 (2015)

 Caloric materials efficiency map.

Spintronics Insight special at Nature Materials

This is a must, one of the essential entries of the year.
Spintronics insight : Nature Materials, Full pdf version

Including the following articles:

New moves of the spintronics tango.
Jairo Sinova and Igor Žutić

Current-induced torques in magnetic materials.
Arne Brataas, Andrew D. Kent and Hideo Ohno  

Spin Hall effect devices.
Tomas Jungwirth, Jörg Wunderlich and Kamil Olejník

Spin caloritronics.
Gerrit E. W. Bauer, Eiji Saitoh and Bart J. van Wees

Silicon spintronics.
Ron Jansen

Spintronics and pseudospintronics in graphene and topological insulators.
Dmytro Pesin and Allan H. MacDonald