Research output: Contribution to journal › Article › peer-review
Structure, magnetic and thermodynamic properties of heterometallic ludwigites : Cu2GaBO5 and Cu2AlBO5Cu2GaBO5 and Cu2AlBO5. / Eremina, R. M.; Gavrilova, T. P.; Moshkina, E. M.; Gilmutdinov, I. F.; Batulin, R. G.; Gurzhiy, V. V.; Grinenko, V.; Inosov, D. S.
In: Journal of Magnetism and Magnetic Materials, Vol. 515, 167262, 01.12.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Structure, magnetic and thermodynamic properties of heterometallic ludwigites
T2 - Cu2GaBO5 and Cu2AlBO5Cu2GaBO5 and Cu2AlBO5
AU - Eremina, R. M.
AU - Gavrilova, T. P.
AU - Moshkina, E. M.
AU - Gilmutdinov, I. F.
AU - Batulin, R. G.
AU - Gurzhiy, V. V.
AU - Grinenko, V.
AU - Inosov, D. S.
PY - 2020/12/1
Y1 - 2020/12/1
N2 - We present an extensive study of the structural, magnetic and thermodynamic properties of high-quality monocrystals of two heterometallic oxyborates from the ludwigite family: Cu2GaBO5 and Cu2AlBO5 in the temperature range above 2 K. The distinctive feature of the investigated structures is the selective distribution of Cu and Ga/Al cations. The unit cell of Cu2GaBO5 and Cu2AlBO5 contains four nonequivalent crystallographic sites of metal ions. Two sites in the structure of Cu2GaBO5 are fully occupied by Cu atoms which form the quasi one-dimensional chains along the a-axis. For Cu2AlBO5 all sites are partially occupied by Al and Cu atoms. The joint analysis of low-temperature data on magnetic susceptibility and magnetic contribution to the specific heat showed that Cu2AlBO5 and Cu2GaBO5 exhibit an antiferromagnetic transition at TN=2.4 and 4.1 K, respectively. The magnetic response below TN can be represented as the sum of two contributions: the ordered component and the paramagnetic contribution from defects of the same relative weight. It is shown that the external magnetic field above 2.5 T and 2.8 T for Cu2GaBO5 and Cu2AlBO5, respectively, leads to a broadening of the magnetic phase transition indicating suppression of the long-range antiferromagnetic order.
AB - We present an extensive study of the structural, magnetic and thermodynamic properties of high-quality monocrystals of two heterometallic oxyborates from the ludwigite family: Cu2GaBO5 and Cu2AlBO5 in the temperature range above 2 K. The distinctive feature of the investigated structures is the selective distribution of Cu and Ga/Al cations. The unit cell of Cu2GaBO5 and Cu2AlBO5 contains four nonequivalent crystallographic sites of metal ions. Two sites in the structure of Cu2GaBO5 are fully occupied by Cu atoms which form the quasi one-dimensional chains along the a-axis. For Cu2AlBO5 all sites are partially occupied by Al and Cu atoms. The joint analysis of low-temperature data on magnetic susceptibility and magnetic contribution to the specific heat showed that Cu2AlBO5 and Cu2GaBO5 exhibit an antiferromagnetic transition at TN=2.4 and 4.1 K, respectively. The magnetic response below TN can be represented as the sum of two contributions: the ordered component and the paramagnetic contribution from defects of the same relative weight. It is shown that the external magnetic field above 2.5 T and 2.8 T for Cu2GaBO5 and Cu2AlBO5, respectively, leads to a broadening of the magnetic phase transition indicating suppression of the long-range antiferromagnetic order.
KW - Antiferromagnetic order
KW - Crystal structure
KW - Ludwigite
KW - Magnetization
KW - Quasi-one-dimensional magnetism
KW - Specific heat
UR - http://www.scopus.com/inward/record.url?scp=85089415225&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2020.167262
DO - 10.1016/j.jmmm.2020.167262
M3 - Article
AN - SCOPUS:85089415225
VL - 515
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
M1 - 167262
ER -
ID: 61629661