TY - JOUR
T1 - HoB4 at high pressure and low temperature
T2 - an experimental and theoretical study
AU - Olsen, Janus Staun
AU - Waskowska, A.
AU - Gerward, L.
AU - Vaitheeswaran...[et al.], G.
PY - 2011/3
Y1 - 2011/3
N2 - Single crystals of HoB4 have been grown and used for synchrotron X-ray diffraction studies at pressures up to 23GPa and temperatures down to 100K. The experimental bulk modulus 195 ± 6GPa is in good agreement with 188.4 and 198.2GPa values calculated in the LSDA and LSDA+U approximations, indicating that mainly the boron sublattice determines the bulk modulus. The experimental c/a ratio decreases slightly with pressure, but the effect is small. An orthorhombic distortion begins at Tc ≈ 295K, i.e. at a temperature much higher than the Neel temperature TN1=7.1K. The behavior is interpreted in terms of built-in strains and crystal mosaicity.
AB - Single crystals of HoB4 have been grown and used for synchrotron X-ray diffraction studies at pressures up to 23GPa and temperatures down to 100K. The experimental bulk modulus 195 ± 6GPa is in good agreement with 188.4 and 198.2GPa values calculated in the LSDA and LSDA+U approximations, indicating that mainly the boron sublattice determines the bulk modulus. The experimental c/a ratio decreases slightly with pressure, but the effect is small. An orthorhombic distortion begins at Tc ≈ 295K, i.e. at a temperature much higher than the Neel temperature TN1=7.1K. The behavior is interpreted in terms of built-in strains and crystal mosaicity.
U2 - 10.1080/08957959.2010.513683
DO - 10.1080/08957959.2010.513683
M3 - Journal article
SN - 0895-7959
VL - 31
SP - 3
EP - 6
JO - High Pressure Research
JF - High Pressure Research
IS - 1
ER -