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Crystals, Volume 14, Issue 5

2024 May - 91 articles

Cover Story: This study explores the growth of high-quality Ge1-xSnx thin films, crucial for near-infrared and mid-infrared applications such as lasers, detectors, and waveguides. Overcoming lattice mismatch and Sn segregation challenges, we investigate a novel growth technique utilizing ultra-high vacuum molecular beam epitaxy on a sapphire/III-V semiconductor substrate. We achieved Ge1-xSnx films with over 10% Sn content by employing composition and temperature gradients. Characterization via reflection high-energy electron diffraction, high-resolution X-ray diffraction, Raman spectroscopy, and photoluminescence confirms high-quality growth. This advancement opens avenues for microwave photonics on a single sapphire chip, leveraging sapphire's advantages for efficient waveguides and microwave electronics. View this paper
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Articles (91)

  • Review
  • Open Access
4 Citations
3,769 Views
38 Pages

19 May 2024

The importance and breadth of applications of the family of quaternary chalcogenides with the formula Cu2ZnSnSxSe(4−x) (CZTS/Se) where x = 0–4 are steadily expanding due to the tunable optoelectronic properties of these compounds and the...

  • Article
  • Open Access
2 Citations
1,795 Views
10 Pages

19 May 2024

[M4O4] (M = 3d transition metal) represents an interesting class of compounds featuring cubane-type molecular structures, and particularly, [Mn4O4] cubanes or their derivatives attract much attention by virtue of their potential applications as singl...

  • Article
  • Open Access
6 Citations
2,468 Views
22 Pages

19 May 2024

The need for combining dissimilar materials is steadily increasing in the manufacturing industry, and the resulting products are expected to always have high performance. While there are various methods available for joining such material pairs, one...

  • Communication
  • Open Access
2 Citations
3,213 Views
14 Pages

R-Phase Transformation Evolution in NiTi SMA Wires Studied via the Internal Friction Technique

  • Yuhao Xu,
  • Junlan Chen,
  • Xinggang Wang,
  • Meng Sun,
  • Xianping Wang and
  • Weibin Jiang

18 May 2024

The specific damping capacity variation of heat-treated NiTi was observed during a pseudoelasticity test. The detailed B2 → R-phase transformation process in cold-drawn NiTi wires undergoing middle-temperature aging was studied via X-ray diffrac...

  • Review
  • Open Access
3 Citations
2,377 Views
25 Pages

18 May 2024

This review summarizes the structural characteristics and physicochemical properties of chiral 4f and 3d-4f complexes based on enantiopure salen-type Schiff base ligands. The chirality originates from the enantiopure diamines and is imparted to the S...

  • Article
  • Open Access
3 Citations
1,903 Views
16 Pages

Reactive Magnetron Sputtering for Y-Doped Barium Zirconate Electrolyte Deposition in a Complete Protonic Ceramic Fuel Cell

  • Victoire Lescure,
  • Mélanie François,
  • Maëlys Charleux,
  • Eric Aubry,
  • Lionel Combemale,
  • Pascal Briois and
  • Gilles Caboche

18 May 2024

Yttrium-doped barium zirconate is a commonly used electrolyte material for Protonic Ceramic Fuel Cells (PCFC) due to its high protonic conductivity and high chemical stability. However, it is also known for its poor sinterability and poor grain bound...

  • Article
  • Open Access
3 Citations
2,171 Views
11 Pages

17 May 2024

PbF2 single crystals are usually grown in the temperature gradient region by the Bridgman–Stockbarger method. Temperature distribution during the growth process is particularly important for the preparation of high-quality crystals. In this stu...

  • Communication
  • Open Access
1,450 Views
8 Pages

17 May 2024

Infrared analysis reveals the presence of interwoven inclusions, primarily comprised of silicon nitride and silicon carbide, in the casting process of monocrystalline silicon ingots. This study investigates how the longitudinal temperature gradient a...

  • Article
  • Open Access
1,710 Views
21 Pages

17 May 2024

Titanites can be excellent markers of element transfer in medium-temperature retrograde metamorphism. Euhedral titanites from several alpine fissures from Mont Blanc, particularly those of Périades and Courtes, crystallised at the end of the m...

  • Article
  • Open Access
4 Citations
2,611 Views
14 Pages

Surface Enhancement of Titanium-Based Coatings on Commercial Hard Steel Cutting Tools

  • Minh Nhat Dang,
  • Surinder Singh,
  • Hannah J. King,
  • John H. Navarro-Devia,
  • Hoang Le,
  • Thomas G. Pattison,
  • Rosalie K. Hocking,
  • Scott A. Wade,
  • Guy Stephens and
  • James Wang
  • + 2 authors

17 May 2024

This study investigates the mechanical properties, surface integrity, and chemical configuration of PVD-coated high-speed steel (HSS) cutting tools, with a particular focus on titanium nitride (TiN) and titanium aluminium nitride (TiAlN) coatings. A...

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Crystals - ISSN 2073-4352