caa a22 4500 445366192 CHVBK 20180317142931.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0291-3 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0291-3 Analysis of the Low Temperature Magnetic Contributions to the Specific Heat of(Nd x Y1− x )2/3Ca1/3MnO3 ( x =0, 0.1) [Elektronische Daten] [A. Feher, S. Dolya, E. Fertman, M. Kajňaková, V. Desnenko, J. Šebek, E. Šantavá] The low temperature specific heat of the colossal magnetoresistance compounds (NdxY1−x )2/3Ca1/3MnO3 (x=0, 0.1) for 0.4≤T<2 K in magnetic fields up to H=9 T has been studied. Applied magnetic fields lead to the drop of the low temperature specific heat by more than 2 orders, which implies a large magnetic contribution. Experimental data were successfully fitted by the sum of the hyperfine C hyp, the linear T-dependent C sg and the spin waves C sw contributions. The C sg attributed to the glassy state of the magnetic systems of the studied insulating compounds exponentially decreases with the increase of H up to ∼5 T. The C sw providing the best fitting of the experimental data is attributed to the ferromagnetic spin waves with pseudo gap Δ(H) in the spin-wave spectrum which increases linearly with the increase of the applied magnetic field. The Δ(0)∼0.8 K is approximately the same for both compounds studied. Springer Science+Business Media, LLC, 2010 Specific heat nationallicence Spin-wave excitations nationallicence Magnetic glass nationallicence Feher A. Centre of Low Temperature Physics of the Faculty of Science UPJŠ and IEP SAS, Park Angelinum 9, 04154, Košice, Slovakia aut Dolya S. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut Fertman E. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut Kajňaková M. Centre of Low Temperature Physics of the Faculty of Science UPJŠ and IEP SAS, Park Angelinum 9, 04154, Košice, Slovakia aut Desnenko V. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut Šebek J. Institute of Physics of AS CR, 18221, Prague, Czech Republic aut Šantavá E. Institute of Physics of AS CR, 18221, Prague, Czech Republic aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 529-535 0022-2291 162:5-6<529 2011 162 10909 https://doi.org/10.1007/s10909-010-0291-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0291-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Feher A. Centre of Low Temperature Physics of the Faculty of Science UPJŠ and IEP SAS, Park Angelinum 9, 04154, Košice, Slovakia aut NATIONALLICENCE 700 1- Dolya S. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Fertman E. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Kajňaková M. Centre of Low Temperature Physics of the Faculty of Science UPJŠ and IEP SAS, Park Angelinum 9, 04154, Košice, Slovakia aut NATIONALLICENCE 700 1- Desnenko V. B.Verkin Institute for Low Temperature Physics & Engineering, NASU, 47 Lenin Ave., 61103, Kharkov, Ukraine aut NATIONALLICENCE 700 1- Šebek J. Institute of Physics of AS CR, 18221, Prague, Czech Republic aut NATIONALLICENCE 700 1- Šantavá E. Institute of Physics of AS CR, 18221, Prague, Czech Republic aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 529-535 0022-2291 162:5-6<529 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer