Subject classification: 0 and 12.2; 7; 22 M . KirovLongitudinal and transverse velocities of sound in [loo] and [110] directions were measured at 80 t o 400 K in single crystals of the isostructural monosilicides of Co, Mn, and Fe and in polycrystalline CrSi. The temperature dependences of the elastic constants and moduli for CoSi, MnSi, and CrSi were described by a theoretical equation. Values of flD(0) were found by extrapolating the elastic constants and moduli to 0 K. The anomalous temperature dependences of elastic constants of FeSi, the behaviour of Griineisen coefficients, and the phonon frequency distribution in the monosilicides studied are discussed.B m a n a 3 0~e TeMnepaTyp OT 80 no 400 K m3~epe~b1 npononbmae H nonepevHbIe CKOPOCTH a~ytca B HanpasneHmx [loo] EI [llO] B MOHOKPMCTa. IIJIH4eCKBX o6paauax ki3OCTpYKTYpHblX MOHOCHnHIUVXOB CO, Mn II Fe ki B IIOJIHKpkicTaJInHWXKOM o6paaue CrSi. TeMnepaTypHbIe BBBHCAMOCTM YIIpyrllX IIOCTOHHHbIX ki MOnYJIea COSi, MnSi Ez CrSi OIIkiCaHbI TeOpeTHgeCHHM YpaBHeHkieM. 3KCTpallOJlkipOBaHHbIe IE 0 K YIIpyrkIe IIOCTOflHHbIe II MOnyJIEz HCIIOJIb30BaHbI AJIH paCseTa flD(0). 06Cy)KAaH)TCH aHoMamHbIe TemepaTypIme 3aBHCki MOCTEz ynpyrmx IIOCTOIIHH~IX FeSi, a Tam-te noseneme K O~( P @ H U I~~H T O B r p m~a i h e~a ki YaCTOTHOe pacnpeneneme (POHOHOB HCCJIeHOBaIIHblX MOHOCMJIMUUHOB.

No abstract

No abstract

No abstract

No abstract