Effects of Spin Fluctuations on the Specific Heat in YMn2 and Y0.97Sc0.03Mn2

Hideto Imai; Hirofumi Wada; Masayuki Shiga

doi:10.1143/JPSJ.64.2198

Effects of Spin Fluctuations on the Specific Heat in YMn₂ and Y_0.97Sc_0.03Mn₂

Hideto Imai, Hirofumi Wada, Masayuki Shiga

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6 Citations (Scopus)

Abstract

The specific heat measurements of YMn₂ and Y_0.97Sc_0.03Mn₂, which exhibit giant spin fluctuations in the paramagnetic state, were carried out in the temperature range of 13 K to 300 K. The spin fluctuation contribution to the specific heat C_m was estimated by subtracting the phonon and electronic parts. The magnetic entropy S_m was deduced from C_m. Above 120 K, where the the effect of the antiferromagnetic transition vanishes, the entropy curves of two compounds coincide each other, indicating that in the paramagnetic state, YMn₂ has the same amplitude of spin fluctuations as Y_0.97Sc_0.03Mn₂. The absolute value of the entropy was also discussed taking account of results of neutron scattering measurements.

Original language	English
Pages (from-to)	2198-2202
Number of pages	5
Journal	Journal of the Physical Society of Japan
Volume	64
Issue number	6
DOIs	https://doi.org/10.1143/JPSJ.64.2198
Publication status	Published - Jan 1 1995
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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title = "Effects of Spin Fluctuations on the Specific Heat in YMn2 and Y0.97Sc0.03Mn2 ",

abstract = "The specific heat measurements of YMn2 and Y0.97Sc0.03Mn2, which exhibit giant spin fluctuations in the paramagnetic state, were carried out in the temperature range of 13 K to 300 K. The spin fluctuation contribution to the specific heat Cm was estimated by subtracting the phonon and electronic parts. The magnetic entropy Sm was deduced from Cm. Above 120 K, where the the effect of the antiferromagnetic transition vanishes, the entropy curves of two compounds coincide each other, indicating that in the paramagnetic state, YMn2 has the same amplitude of spin fluctuations as Y0.97Sc0.03Mn2. The absolute value of the entropy was also discussed taking account of results of neutron scattering measurements.",

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T1 - Effects of Spin Fluctuations on the Specific Heat in YMn2 and Y0.97Sc0.03Mn2

AU - Imai, Hideto

AU - Wada, Hirofumi

AU - Shiga, Masayuki

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The specific heat measurements of YMn2 and Y0.97Sc0.03Mn2, which exhibit giant spin fluctuations in the paramagnetic state, were carried out in the temperature range of 13 K to 300 K. The spin fluctuation contribution to the specific heat Cm was estimated by subtracting the phonon and electronic parts. The magnetic entropy Sm was deduced from Cm. Above 120 K, where the the effect of the antiferromagnetic transition vanishes, the entropy curves of two compounds coincide each other, indicating that in the paramagnetic state, YMn2 has the same amplitude of spin fluctuations as Y0.97Sc0.03Mn2. The absolute value of the entropy was also discussed taking account of results of neutron scattering measurements.

AB - The specific heat measurements of YMn2 and Y0.97Sc0.03Mn2, which exhibit giant spin fluctuations in the paramagnetic state, were carried out in the temperature range of 13 K to 300 K. The spin fluctuation contribution to the specific heat Cm was estimated by subtracting the phonon and electronic parts. The magnetic entropy Sm was deduced from Cm. Above 120 K, where the the effect of the antiferromagnetic transition vanishes, the entropy curves of two compounds coincide each other, indicating that in the paramagnetic state, YMn2 has the same amplitude of spin fluctuations as Y0.97Sc0.03Mn2. The absolute value of the entropy was also discussed taking account of results of neutron scattering measurements.

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Effects of Spin Fluctuations on the Specific Heat in YMn₂ and Y_0.97Sc_0.03Mn₂

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