Use of a pendulum magnetometer for measuring the magnetic susceptibility of solids under pressure: The compound V4S9Br4

Панфилов, А. С.

doi:10.1063/1.4938094

Cited by 15 publications

(4 citation statements)

References 16 publications

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“…The measurements of the uniform pressure effect on magnetic susceptibility of LaCoO 3 were carried out under helium gas pressure P up to 2 kbar, using a pendulum type magnetometer [29]. The sample was cut in the shape of parallelepiped with dimensions of 3 × 3 × 2 mm and a mass of 0.125 grams.…”

Section: Experimental Details and Resultsmentioning

confidence: 99%

Pressure effect on magnetic susceptibility of LaCoO$_3$

Panfilov,

Grechnev,

Zhuravleva

et al. 2018

Preprint

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The effect of pressure on magnetic properties of LaCoO3 is studied experimentally and theoretically. The pressure dependence of magnetic susceptibility χ of LaCoO3 is obtained by precise measurements of χ as a function of the hydrostatic pressure P up to 2 kbar in the temperature range from 78 K to 300 K. A pronounced magnitude of the pressure effect is found to be negative in sign and strongly temperature dependent. The obtained experimental data are analysed by using a two-level model and DFT+U calculations of the electronic structure of LaCoO3. In particular, the fixed spin moment method was employed to obtain a volume dependence of the total energy difference ∆ between the low spin and the intermediate spin states of LaCoO3. Analysis of the obtained experimental χ(P ) dependence within the two-level model, as well as our DFT+U calculations, have revealed the anomalous large decrease in the energy difference ∆ with increasing of the unit cell volume. This effect, taking into account a thermal expansion, can be responsible for the temperatures dependence of ∆, predicting its vanishing near room temperature.

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Section: Experimental Details and Resultsmentioning

confidence: 99%

Pressure effect on magnetic susceptibility of LaCoO$_3$

Panfilov,

Grechnev,

Zhuravleva

et al. 2018

Preprint

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“…The susceptibility of samples of YFe 4 Al 8 , YMn 4 Al 8 , and CeCr 4 Al 8 under pressure was studied using a pendulum magnetometer with its mechanical part situated directly in the high-pressure chamber. 19 Gaseous helium was used as the pressure transfer medium. Measurements were made under pressures P of up to 2 kbar at temperatures of 78, 150, and 300 K in a magnetic field of 15-17 kOe.…”

Section: Experimental Details and Resultsmentioning

confidence: 99%

Electronic structure and magnetic properties of RT4Al8 (R = Sc, Y, La, Lu; T = Fe, Mn, Cr) compounds. Hydrostatic pressure effects

Zhuravleva

Grechnev

Панфилов

et al. 2016

Low Temperature Physics

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“…The uniform pressure effect on the magnetic susceptibility of

{La}_{1 - x} {Pr}_{x} {CoO}_{3}

was studied under helium gas pressure P up to 2 kbar, using a pendulum‐type magnetometer. [ 38 ] To eliminate the effect on susceptibility of the temperature changes when pressure was applied, the measurements were carried out at fixed temperatures 78, 150, and 300 K. The relative experimental errors did not exceed 0.1% for the used magnetic field

H = 1.7 T

.…”

Section: Methodsmentioning

confidence: 99%

Effects of Temperature and Pressure on the Magnetic Properties of La_1–xPr_xCoO₃

Панфилов

Lyogenkaya

Grechnev

et al. 2020

Physica Status Solidi (b)

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For La1–xPrxCoO3 cobaltites (x = 0, 0.1, 0.2, and 0.3), the dependence of magnetic susceptibility χ(T) is studied in the temperature range 5–400 K. Also, the crystal structure of these cobaltites is investigated, and the effect of pressure up to 2 kbar on their susceptibility is measured at T=78, 150, and 300 K. The specific dependencies χ(T) and the large negative pressure effect are assumed to arise from Co3+ ions contribution to the total susceptibility evaluated using La1−xPrxAlO3 as a reference system. The obtained experimental data on temperature and pressure effects in magnetism are analyzed within a two‐level model with energy gap Δ between the ground state of the system with zero spin of Co3+ ions and the excited higher‐spin state. In this model, magnetism of Co3+ ions is determined by the temperature‐induced population of the excited state, and magnitude of the pressure effect is governed by the volume dependence of Δ. The results of the analysis, supplemented by the theoretical calculations of the electronic structures of LaCoO3 and PrCoO3, indicate significant increase in Δ with decrease in the unit cell volume both under hydrostatic pressure and by substituting La with Pr having a smaller ionic radius.

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Use of a pendulum magnetometer for measuring the magnetic susceptibility of solids under pressure: The compound V4S9Br4

Cited by 15 publications

References 16 publications

Pressure effect on magnetic susceptibility of LaCoO$_3$

Pressure effect on magnetic susceptibility of LaCoO$_3$

Electronic structure and magnetic properties of RT4Al8 (R = Sc, Y, La, Lu; T = Fe, Mn, Cr) compounds. Hydrostatic pressure effects

Effects of Temperature and Pressure on the Magnetic Properties of La_1–xPr_xCoO₃

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Use of a pendulum magnetometer for measuring the magnetic susceptibility of solids under pressure: The compound V4S9Br4

Cited by 15 publications

References 16 publications

Pressure effect on magnetic susceptibility of LaCoO$_3$

Pressure effect on magnetic susceptibility of LaCoO$_3$

Electronic structure and magnetic properties of RT4Al8 (R = Sc, Y, La, Lu; T = Fe, Mn, Cr) compounds. Hydrostatic pressure effects

Effects of Temperature and Pressure on the Magnetic Properties of La1–xPrxCoO3

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Effects of Temperature and Pressure on the Magnetic Properties of La_1–xPr_xCoO₃