Sputtered thermionic hexaboride coatings

SmB 6 nanoparticles: Synthesis, valence states, and magnetic properties

“…More recently, the mixed valence SmB 6 as a multi-functional * E-mail address: tegusph@imnu.edu.cn M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT hexaboride is considered the candidate material for topological Kondo insulators [13][14][15] and its optical absorption properties have become a hot research topic [16]. In addition, the SmB 6 have relatively lower work function of 3.11 eV and that makes it to be a potential thermionic emission material [17]. Therefore, there are great research prospects for further studying the SmB 6 intrinsic properties.…”

Single-crystalline SmB6 nanowires

“…High melting point, high strength, and high chemical stability, as well as other special peculiarities, such as a low electronic work function, stable specific resistance, a low expansion coefficient in some temperature ranges, and high neutron absorbability, make these materials suitable for use as component of high-energy optical systems [7][8][9], sensors for high-resolution detectors [10], electrical coatings for resistors, thermionic materials [11,12], and nuclear technology [13]. SmB 6 , one of the rare-earth hexaborides, is a classical fluctuating-valence semiconductor [14] and Kondo insulators [15], and have the relatively lower work function (3.11 eV) [16], which can make it to be used as potential thermionic emission materials. Therefore, samarium hexaboride has attracted considerable contemporary interest from both the fundamental and practical viewpoints.…”

“…SmB 6 powders have been prepared by the reduction of Sm 2 O 3 with B in vacuum at 1650 1C [19]; by carbonthermal reduction of samarium oxide (Sm 2 O 3 ) with boron carbide (B 4 C), B and carbon (C) [19], and by reaction of Sm 2 O 3 with B and C [20]. SmB 6 films were prepared by DC magnetron sputtering from the SmB 6 target [21] and by electron-beam evaporation of the corresponding bulk materials [22].…”

Nontrivial Nature and Penetration Depth of Topological Surface States in SmB6 Thin Films

“…The stoichiometry of the SmB 6 was confirmed by X-ray photoelectron spectroscopy. 42,52,53 The YIG is magnetized by a field (H) along the y axis. The magnetic moments in the YIG are driven to precess by placing a microstrip line on the sample and feeding it with a microwave.…”