Low-temperature heat capacity of dysprosium diboride

Новиков, В. В.; Matovnikov, A. V.

doi:10.1007/s10973-006-8054-8

Cited by 23 publications

(13 citation statements)

References 3 publications

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“…[5], and for the x = 1 sample, we used the previously reported zero-field specific heat data of Ref. [20]. Then the T | and T ad MAX for  0 H = 5 T, when compared to compounds with similar T mag such as ErAl 2 [25], TmGa [26], EuS [27], HoN [28,29] [37] , although both of them are lower than Er 0.53 Ho 0.47 Co 2 [38,39].…”

Section: Magnetocaloric Propertiesmentioning

confidence: 99%

“…The last value is defined as: T mid is chosen to maximize the value of TEC in a given working temperature range of a material T lift ) (Conventional figure of merits such as refrigerant capacity and relative cooling power, are also tabulated in supplementary information).For this purpose, the values of entropy change of the materials for comparison are converted into volumetric units by using the density contained in the AtomWork[24] database, unless otherwise provided by the authors. Also, the values of TEC(10) andTEC(20) are estimated from the reported entropy curves within the contained references when not reported by the authors. We show the obtained values for |S , and TEC(20) in Figs.…”

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confidence: 99%

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Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Castro

Terashima

Yamamoto

et al. 2020

Science and Technology of Advanced Materials

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Recently, a massive magnetocaloric effect near the liquefaction temperature of hydrogen has been reported in the ferromagnetic material HoB 2 . Here we investigate the effects of Dy substitution in the magnetocaloric properties of Ho 1- x Dy x B 2 alloys ( x = 0, 0.3, 0.5, 0.7, 1.0). We find that the Curie temperature ( T C ) gradually increases upon Dy substitution, while the magnitude of the magnetic entropy change |Δ S M | and adiabatic temperature change Δ T ad showed a gradual decrease. On the other hand, due to the presence of successive transitions in these alloys, the peak height of the above magnetocaloric properties tends to be kept in a wide temperature range, leading to a relatively robust figure of merit in a wide temperature span. These alloys could be interesting candidates for magnetic refrigeration in the temperature range of 10–60 K.

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Section: Magnetocaloric Propertiesmentioning

confidence: 99%

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confidence: 99%

Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Castro

Terashima

Yamamoto

et al. 2020

Science and Technology of Advanced Materials

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“…The comparison of anomalies of temperature dependences of the heat capacity and thermal expansion of RE‐diborides was made on the basis of experimental data given in the papers 4–7, 9–11. In Fig.…”

Section: The Approach Descriptionmentioning

confidence: 99%

“…The magnetic phase transitions, which take place in diborides of rare‐earth elements RB 2 at low temperatures, are shown on temperature dependences of their various properties–magnetization M ( T ), heat capacity C p ( T ), electric conductivity σ ( T ), thermal expansion coefficients α a ( T ), α c ( T )–in the form of distinct anomalies 1–10. These anomalies reflect the response of corresponding subsystems of diborides to the disordering processes in the system of the magnetic moments of rare‐earth ions in the diboride structure.…”

Section: Introductionmentioning

confidence: 99%

“…The Curie temperatures for compounds of the studied group according to magnetization data are 151, 55, 15, and 16 K, respectively (LuB 2 is diamagnetic) 1. On the temperature dependences of heat capacity C p ( T ) of ferromagnetic RE‐diborides there are sharp and smooth anomalies caused by magnetic phase transitions “ferromagnet–paramagnet”, and also by phenomena of other nature (the Schottky contribution to the heat capacity) 4–7. On the C p ( T ) dependence of DyB 2 there is a second, high‐temperature peak at T = 178.8 K of an unknown nature.…”

Section: Introductionmentioning

confidence: 99%

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Anomalies of thermal expansion and change of entropy of rare‐earth diborides at the temperatures of magnetic transitions

Новиков

Chukina

2010

Physica Status Solidi (b)

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An entropy method has been proposed for calculating magnetic heat capacity C m of rare-earth diborides on their thermal expansion data. It was found that the temperature changes of magnetic entropy DS m (T) calculated from calorimetric data correlate with the magnetic components of lattice parameters Da m (T) and Dc m (T) calculated from X-ray diffraction data.Using this correlation, a formula for C m (T) has been derived. Calculations of C m (T) for TbB 2 , DyB 2 , HoB 2 , and ErB 2 have been carried out. The temperature dependencies C m (T) obtained from X-ray diffraction data are in a good agreement with the calorimetric data.

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Compositional Studies of Metals with Complex Order by means of the Optical Floating‐Zone Technique

Bauer

Benka

Neubauer

et al. 2021

Physica Status Solidi (b)

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The availability of large high‐quality single crystals is an important prerequisite for many studies in solid‐state research. The optical floating‐zone technique is an elegant method to grow such crystals, offering potential to prepare samples that may be hardly accessible with other techniques. As elaborated in this report, examples include single crystals with intentional compositional gradients, deliberate off‐stoichiometry, or complex metallurgy. For the cubic chiral magnets Mn1–xFexSi and Fe1–xCoxSi, single crystals are prepared in which the composition is varied during growth from x = 0 to 0.15 and from x = 0.1 to 0.3, respectively. Such samples allow us to efficiently study the evolution of the magnetic properties as a function of composition, as demonstrated by means of neutron scattering. For the archetypical chiral magnet MnSi and the itinerant antiferromagnet CrB2, single crystals with varying initial manganese (0.99–1.04) and boron (1.95–2.1) content are grown. Measurements of the low‐temperature properties address the correlation between magnetic transition temperature and sample quality. Furthermore, single crystals of the diborides ErB2, MnB2, and VB2 are prepared. In addition to high vapor pressures, these materials suffer from peritectic formation, potential decomposition, and high melting temperature, respectively.

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Low-temperature heat capacity of dysprosium diboride

Cited by 23 publications

References 3 publications

Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Anomalies of thermal expansion and change of entropy of rare‐earth diborides at the temperatures of magnetic transitions

Compositional Studies of Metals with Complex Order by means of the Optical Floating‐Zone Technique

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Low-temperature heat capacity of dysprosium diboride

Cited by 23 publications

References 3 publications

Effect of Dy substitution in the giant magnetocaloric properties of HoB2

Effect of Dy substitution in the giant magnetocaloric properties of HoB2

Anomalies of thermal expansion and change of entropy of rare‐earth diborides at the temperatures of magnetic transitions

Compositional Studies of Metals with Complex Order by means of the Optical Floating‐Zone Technique

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Effect of Dy substitution in the giant magnetocaloric properties of HoB₂

Effect of Dy substitution in the giant magnetocaloric properties of HoB₂