Oxygen ion-beam modification of vanadium oxide films for reaching a high value of the resistance temperature coefficient - T. M. Sabov; O. S. Oberemok; O. V. Dubikovskyi; V. P. Melnik; V. P. Kladko; B. M. Romanyuk; V. G. Popov; Yo. Gudymenko; N. V. Safriuk (Semiconductor Physics, Quantum Electronics and Optoelectronics, 2017)