73. Crystal Structures of Aluminum based Hydrides. Vajeeston, Ponniah; Fjellvåg, Helmer. Emerging Materials Research 2015 ;Volum 4.(2) s.192-217.
72. Hydrogen storage properties of –Mg(BH4)2 modified by MoO3 and TiO2. Saldan, Ivan; Frommen, Christoph; Llamas-Jansa, Isabel; Kalantzopoulos, Georgios N.; Hino, Satoshi; Arstad, Bjørnar; Heyn, Richard H.; Zavorotynska, Olena; Deledda, Stefano; Sørby, Magnus Helgerud; Fjellvåg, Helmer; Hauback, Bjørn. International journal of hydrogen energy 2015 ;Volum 40.(36) s.12286-12293.
71. Thermal stability of photovoltaic a-Si:H determined by neutron reflectometry. Qviller, Atle Jorstad; Dennison, A.J.C.; Haug, Halvard; You, Chang Chuan; Hasle, Ida Margrete; Østreng, Erik; Fjellvåg, Helmer; Vorobiev, A.; Hjorvarsson, B; Marstein, Erik Stensrud; Frommen, Christoph; Hauback, Bjørn. Applied Physics Letters 2014 ;Volum 105.(23)
70. Revised electronic structure, Raman and IR studies of AB2H2 and ABCH (A = Sr, Ba; B = Al, Ga; C = Si, Ge) phases. Vajeeston, Ponniah; Fjellvåg, Helmer. RSC Advances 2014 ;Volum 4.(1) s. 22-31.
69. Structural and spectroscopic characterization of potassium fluoroborohydrides. Heyn, Richard H; Saldan, Ivan; Sørby, Magnus Helgerud; Frommen, Christoph; Arstad, Bjørnar; Bouzga, Aud Mjærum; Fjellvåg, Helmer; Hauback, Bjørn. Physical Chemistry, Chemical Physics - PCCP 2013 ;Volum 15.(27) s. 11226-11230.
68. MgH2 in Carbon Scaffolds: A Combined Experimental and Theoretical Investigation. Vajeeston, Ponniah; Sartori, Sabrina; Ravindran, Ponniah; Knudsen, Kenneth; Hauback, Bjørn; Fjellvåg, Helmer. The Journal of Physical Chemistry C 2012 ;Volum 116.(40) s. 21139-21147.
67. Influence of Crystal Structure of Bulk Phase on the Stability of Nanoscale Phases: Investigation on MgH2 Derived Nanostructures. Vajeeston, Ponniah; Ravindran, P; Fichtner, M.; Fjellvåg, Helmer. The Journal of Physical Chemistry C 2012;Volum 116.(35) s. 18965-18972.
66. Oxide Coating of Alumina Nanoporous Structure Using ALD to Produce Highly Porous Spinel. Rauwel, Protima; Walmsley, John; Frogner, Heidi Berge; Rytter, Erling; Fjellvåg, Helmer; Rauwel, Erwan Yann; Nilsen, Ola. Chemical Vapor Deposition 2012 ;Volum 18.(10-12) s. 315-325.
65. Prediction of crystal structure, lattice dynamical, and mechanical properties of CaB2H2. Vajeeston, Ponniah; Ravindran, Ponniah; Hauback, Bjørn; Fjellvåg, Helmer. International journal of hydrogen energy 2011; 36.(16) s.10149-10158.
64. Phonon, IR, and Raman Spectra, NMR Parameters, and Elastic Constant Calculations for AlH3 Polymorphs. Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer. Journal of Physical Chemistry A 2011;Volum 115.(39) s.10708-10719.
63. Stability enhancement by particle size reduction in AlH3. Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer. Journal of Alloys and Compounds 2011 ;Volum 509. s.S662-S666.
62. Synthesis, crystal structure, and thermal properties of the first mixed-metal and anion-substituted rare earth borohydride LiCe(BH4)3Cl. Frommen, Christoph; Sørby, Magnus Helgerud; Ravindran, Ponniah; Vajeeston, Ponniah; Fjellvåg, Helmer; Hauback, Bjørn. Journal of Physical Chemistry C 2011; 115(47), 23591-602.
61. Nano-phases of NaBH4 and KBH4. Vajeeston P; Ravindran P; Fjellvåg H. Journal of nanoscience and nanotechnology (2011), 11(3), 1929-34.
60. An in-situ neutron diffraction study of the thermal disproportionation of the Zr2FeD5 system. Pitt, M. P.; Pitt, L. K. W.; Fjellvåg, H.; Hauback, B. C. J Alloys Compounds (2011), 509(18), 5515-24.
59. Nanostructures of LiBH4: a density-functional study. Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer. Nanotechnology (2009); 20(27) 275704.
58. A semi-empirical approach to accurate standard enthalpies of formation for solid hydrides. Klaveness, A.; Fjellvåg, H.; Kjekshus, A.; Ravindran, P.; Swang, O. Journal of Alloys and Compounds (2009), 469(1-2), 617-622.
57. Hydride formation in ball-milled and cryomilled Mg-Fe powder mixtures. Riktor, Marit D.; Deledda, Stefano; Herrich, Monika; Gutfleisch, Oliver; Fjellvåg, Helmer; Hauback, Bjorn C. Materials Science & Engineering, B (2009), 158(1-3), 19-25.
56. Reverse Monte Carlo investigation of the temperature dependent deuterium distribution in ZrCr2D4. Sørby, M. H.; Mellergard, A.; Hauback, B. C.; Fjellvåg, H.; Delaplane, R. G. Journal of Alloys and Compounds (2008), 457(1-2), 225-232.
55. Magnetic-instability-induced giant magnetoelectric coupling. Ravindran, Ponniah; Vidya, Ravindran; Eriksson, Olle; Fjellvåg, Helmer. Advanced Materials (2008), 20(7), 1353-1356.
54. Novel High Pressure Phases of β-AlH3: A Density-Functional Study. Vajeeston, P.; Ravindran, P.; Fjellvåg, H. Chemistry of Materials (2008), 20(19), 5997-6002.
53. Theoretical investigations on low energy surfaces and nanowires of MgH2. Vajeeston, P.; Ravindran, P.; Fjellvåg, H. Nanotechnology (2008), 19(27), 275704/1-275704/6.
52. Crystal chemistry and metal-hydrogen bonding in anisotropic and interstitial hydrides of intermetallics of rare earth (R) and transition metals (T), RT3 and R2T7. Yartys, Volodymyr A.; Vajeeston, Ponniah; Riabov, Alexander B.; Ravindran, Ponniah; Denys, Roman V.; Maehlen, Jan Petter; Delaplane, Robert G.; Fjellvåg, Helmer. Zeitschrift fuer Kristallographie (2008), 223(10), 674-689.
51. Structural phase stability studies on MBeH3 (M = Li, Na, K, Rb, Cs) from density functional calculations. Vajeeston P; Ravindran P; Fjellvåg H. Inorganic chemistry (2008), 47(2), 508-14.
50. First-principles investigations of the MMgH3 ( M = Li, Na, K, Rb, Cs) series. Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. J. of Alloys and Compounds (2008), 450(1-2), 327-337.
49. A new series of high hydrogen content hydrogen-storage materials - A theoretical prediction. Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer. J. Alloys and Compounds 2007;446:44-47.
48. Structure and bonding in BAlH5 (B = Be, Ca, Sr) from first-principle calculations. Klaveness, Arne; Vajeeston, Ponniah; Ravindran, Ponniah; Fjellvåg, Helmer; Kjekshus, Arne. Journal of Alloys and Compounds 2007;433.
47. Phase stability, electronic structure, and optical properties of indium oxide polytypes. Karazhanov, Smagul; Ravindran, Ponniah; Vajeeston, Ponniah; Ulyashin, A; Finstad, Terje; Fjellvåg, Helmer. Physical Review B. Condensed Matter and Materials Physics 2007;76(7).
46. Electronic structure and optical properties of ZnX (X=O, S, Se, Te): A density functional study. Karazhanov, S. Zh.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H.; Svensson, B. G. Physical Review B: Condensed Matter and Materials Physics (2007), 75(15), 155104/1-155104/14.
45. Structural phase stability and bonding behavior of BAlH5 (B=Mg,Ba) from first-principles calculations. Klaveness, A.; Vajeeston, P.; Ravindran, P.; Fjellvåg, H.; Kjekshus, A. Physical Review B: 2006, 73(9), 094122/1-7.
44. Structural stability and pressure-induced phase transitions in MgH2. Vajeeston, P.; Ravindran, P.; Hauback, B. C.; Fjellvåg, H.; Kjekshus, A.; Furuseth, S.; Hanfland, M. Physical Review B: Condensed Matter and Materials Physics (2006), 73(22), 224102/1-8.
43. High hydrogen content complex hydrides: A density-functional study. Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. Applied Physics Letters 2006, 89(7), 071906/1-3.
42. Modeling of hydrogen storage materials by density-functional calculations. Ravindran, P.; Vajeeston, P.; Vidya, R.; Fjellvåg, H.; Kjekshus, A. J. of Power Sources (2006), 159(1), 88-99.
41. In situ powder synchrotron and neutron diffraction study of Zr2Ni deuterides. Sørby, Magnus Helgerud; Fjellvåg, Helmer; Hauback, Bjørn. Journal of Alloys and Compounds 2005;394:107-115.
40. Theoretical modeling of hydrogen storage materials; Prediction of structure, chemical bond character, and high pressure behaviour. Vajeeston, P; Ravindran, P; Kjekshus, Arne; Fjellvåg, Helmer. Journal of Alloys and Compounds 2005;dec 8:377-383.
39. The crystal structure of KAlD4. Hauback, Bjørn; Brinks, HW; Heyn, RH; Blom, Richard; Fjellvåg, Helmer. Journal of Alloys and Compounds 2005;394:35-38.
38. Pressure-induced phase transitions of LiAlD4 system. Fjellvåg, Helmer. Physical Review B 2005.
37. Comment on 'Structural stability and electronic structure for Li3AlH6' - Reply. Vajeeston, Ponniah; Ravindran, Ponniah; Kjekshus, Arne; Fjellvåg, Helmer. Physical Review B 2005;7159.
36. First-principles investigations of aluminum hydrides: M3AIH6 (M=Na,K). Vajeeston, Ponniah; Ravindran, Ponniah; Kjekshus, Arne; Fjellvåg, Helmer. Physical Review B 2005;71.
35. Site preference of hydrogen in metal, alloy and intermetallic frameworks. Vajeeston, P; Vidya, R.; Fjellvåg, Helmer. Europhysics letters 2005;nov:569-575.
34. Structural stability of alkali boron tetrahydrides ABH4 (A = Li, Na, K, Rb, Cs) from first principle calculation. Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. Journal of Alloys and Compounds (2005), 387(1-2), 97-104.
33. Search for metal hydrides with short hydrogen-hydrogen separation: Ab initio calculations. Vajeeston, P.; Ravindran, P.; Fjellvåg, H.; Kjekshus, A. Physical Review B: Condensed Matter and Materials Physics (2004), 70(1), 014107/1-014107/12.
32. Chemical-bonding and high-pressure studies on hydrogen-storage materials. Ravindran, P.; Vajeeston, P.; Fjellvåg, H.; Kjekshus, A. Computational Materials Science (2004), 30(3-4), 349-357.
31. Structural stability and electronic structure for Li3AlH6. Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. Physical Review B: (2004), 69(2), 020104/1-020104/4.
30. Diffraction studies of alanates. Brinks, H. W.; Hauback, B. C.; Blanchard, D.; Jensen, C. M.; Fichtner, M.; Fjellvåg, H. Advanced Materials for Energy Conversion II, Proceedings of a Symposium held during the TMS Annual Meeting, 2nd, Charlotte, NC. United States, Mar. 14-18, 2004 (2004), Meeting Date 2004, 197-204.
29. Huge-pressure-induced volume collapse in LiAlH4 and its implications to hydrogen storage. Vajeeston, P.; Ravindran, P.; Vidya, R.; Fjellvåg, H.; Kjekshus, A. Physical Review B: (2003), 68(21), 212101/1-212101/4.
28. Magnetic properties of Ca-doped SrRuO3 from full-potential calculations. Vidya, R.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H.; Hauback, B. C. Journal of Solid State Chemistry (2004), 177(1), 146-158.
27. Crystal structure of KAlH4 from first principle calculations. Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. Journal of Alloys and Compounds (2004), 363(1-2), L7-L11.
26. Reverse Monte Carlo investigation of the short-range order in α-VD0.8. Sørby, M. H.; Mellergard, A.; Delaplane, R. G.; Wannberg, A.; Hauback, B. C.; Fjellvåg, H. Journal of Alloys and Compounds (2004), 363(1-2), 209-216.
25. Structural stability of BeH2 at high pressures, Vajeeston, P.; Ravindran, P.; Kjekshus, A.; Fjellvåg, H. Applied Physics Letters (2004), 84(1), 34-36.
24. The decomposition of LiAlD4 studied by in-situ X-ray and neutron diffraction. Brinks, H. W.; Hauback, B. C.; Norby, P.; Fjellvåg, H. Journal of Alloys and Compounds (2003), 351(1-2), 222-227.
23. Short hydrogen-hydrogen separation in RNiInH1.333 (R=La, Ce, Nd). Vajeeston, P.; Ravindran, P.; Vidya, R.; Kjekshus, A.; Fjellvåg, H.; Yartys, V. A. Physical Review B: (2003), 67(1), 014101/1-014101/11.
22. Pressure-induced phase of NaAlH4: A potential candidate for hydrogen storage?. Vajeeston, P.; Ravindran, P.; Vidya, R.; Fjellvåg, H.; Kjekshus, A. Applied Physics Letters (2003), 82(14), 2257-2259.
21. Accurate structure of LiAlD4 studied by combined powder neutron and X-ray diffraction, Hauback, B. C.; Brinks, H. W.; Fjellvåg, H., Journal of Alloys and Compounds (2002), 346(1-2), 184-189.
20. Antiferromagnetic vs. ferromagnetic interactions and spin-glass-like behavior in ruthenates. Ravindran, P.; Vidya, R.; Vajeeston, P.; Kjekshus, A.; Fjellvåg, H.; Hauback, B. C. Solid State Communications (2002), 124(8), 293-298.
19. Pressure-induced structural transition in MgH2. Vajestoon, P., Ravindran, P., Kjekshus, A. and Fjellvåg, H. Phys. Rev. Lett. 89 (2002)175506 (1-4).
18. Violation of the 2Å rule for metal hydrides. Ravindran, P., Vajeeston, P., Vidya, R., Kjekshus, A. and Fjellvåg, H. Physical Review Letters (2002), 89(10), 106403/1-106403/4.
17. The magnetic structure of TbNiSiD1.78. Brinks, H. W., Yartys, V. A., Hauback, B. C., Fjellvåg, H. and Ouladdiaf, B. J. Alloys Comp. 340 (2002) 62-66.
16. Short hydrogen-hydrogen separations in novel intermetallic hydrides, RE3Ni3In3D4 (RE=La, Ce and Nd). Yartys, V.A., Denys, R.V., Hauback, B.C., Fjellvåg, H., Bulyk, I.I., Kalychak, Ya. M., J. Alloys Comp. 330 (2002) 132-140.
15. Hexagonal LaNiSnD2 with a filled ZrBeSi-type structure. Yartys, V. A., Olavesen, T., Hauback, B. C., Fjellvåg, H. and Brinks, H.W., J. Alloys Comp. 330 (2002) 141-145.
14. Structure and magnetic properties of TbNiAl-based deuterides. Brinks, H. W., Yartys, V. A., Hauback, B. C. and Fjellvåg, H., J. Alloys Comp. 330 (2002) 169-174.
13. Electronic structure and bonding studies on Th2Al and Th2AlH4. Vajestoon, P., Vidya, R., Ravindran, P., Kjekshus, A. and Fjellvåg, H. Phys. Rev. B 65 (2002) art.nb. 075101.
12. Orthorhombic NdNiSnD with filled TiNiSi-type structure. Yartys, V. A. Olavesen. T., Hauback, B. C. and Fjellvåg, H. Journal of Alloys and Compounds 336 (2002) 181–186.
11. Large magneto- crystalline anisotropy in bilayer transition metal compounds from first-principles, full potential calculations. Ravindran, P., Kjekshus, A., Fjellvåg, H., James, P., Nordström, L., Johansson, B. and Eriksson, O. Phys Rev. B 6314 (2001) 4409.
10. Crystal structure of Th2Al deuterides. Sørby, M.H., Fjellvåg, H., Hauback, B.C., Maeland, A.J., Yartys, V.A. J. Alloys and Compounds 309 (2000) 154-164.
9. The magnetic structure of TbNiAlD1.1. Brinks, H.W., Yartys, V.A., Hauback, B.C., Fjellvåg, H., Yvon, K., Gingl, F., Vogt, T. J. Alloys and Compounds 311 (2000) 114-119.
8. Neutron diffraction studies of Zr-containing intermettalic hydrides with ordered hydrogen sublattice. V. Orthorhombic Zr3CoD6.9 with filled Re2B-type structure. Riabov, A. B., Yartys, V. A., Fjellvåg, H., Hauback, B. C. and Sørby, M. H. J. Alloy Comp. 296 (2000) 312-316.
7. Neutron diffraction studies of Zr-containing intermettalic hydrides with ordered hydrogen sublattice. IV. Hexagonal Zr6FeAl2Dx (x = 1.3 and 5.6) with partially filled Fe2P-type structure. Yartys, V. A., Fjellvåg, H. and Hauback, B. C. J. Alloy Comp. 290 (1999) 159-165.
6. The structures of hydride phases in the Ti3Al/H system. Maeland, A. J., Hauback, B., Fjellvåg, H. and Sørby, M. Int. J. Hydrogen Energy 24 (1999) 163-168.
5. Neutron diffraction studies of Zr-containing intermettalic hydrides with ordered hydrogen sublattice. III. Orthorhombic Zr3FeDx (x = 1.3, 2.5 and 5.0) with partially filled Re3B-type stucture. Yartys, V. A., Fjellvåg, H., Hauback, B. C., Riabov, A. B. and Sørby, M. H. J. Alloy Comp. 287 (1999) 189 –194.
4. Crystal and magnetic structure of TbNiAl-based deuterides, TbNiAlD0.30 and TbNiAlD1.04, studied by neutron diffraction and synchrotron radiation. Hauback, B. C., Fjellvåg, H., Pålhaugen, L., Yartys, V. A. and Yvon, K. J. Alloy Comp. 293-295 (1999) 178-184.
3. Hydrogen ordering and H-induced phase transformations in Zr-based intermetallic hydrides. Yartys, V. A., Fjellvåg, H., Harris, I. R., Hauback, B. C., Riabov, A. B., Sørby, M. H. and Zavaliy, I. Yu. J. Alloy Comp. 293-295 (1999) 74-87.
2. Neutron diffraction study of Zr-Fe hydrides with ordered hydrogen sublattice. II. Crystal structure of Zr3FeD7. Yartys, V., Fjellvåg, H., Hauback,B. C., A. B. Riabov and M. Sørby, J. Alloys and Compounds 278 (1998) 252 – 259.
1. Neutron diffraction study of Zr-Fe hydrides with ordered hydrogen sublattice. I. Crystal structure of Zr2FeD5. Yartys, V., Fjellvåg, H., Hauback,B. C. and Riabov, A. B. J. Alloys and Compounds 274 (1998) 217-221.