Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14)

S. Arumugam; C. Ganguli; R. Thiyagarajan; D. Bhoi; G. Kalai Selvan; K. Manikandan; A. Pariari; P. Mandal; Y. Uwatoko

doi:10.1038/s41598-017-11927-1

Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14)

S. Arumugam, C. Ganguli, R. Thiyagarajan, D. Bhoi, G. Kalai Selvan, K. Manikandan, A. Pariari, P. Mandal, Y. Uwatoko

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6 Scopus citations

Abstract

The effect of high pressure (up to 8 GPa) on normal and superconducting state properties of PrFeAsO_0.6F_0.12, an 1111-type iron based superconductor close to optimal doped region, has been investigated by measuring the temperature dependence of resistivity. Initially, the superconducting transition temperature (T _c ) is observed to increase slowly by about 1 K as pressure (P) increases from 0 to 1.3 GPa. With further increase in pressure above 1.3 GPa, T _c decreases at the rate of ~1.5 K/GPa. The normal-state resistivity decreases monotonically up to 8 GPa. We have also measured the pressure dependence of magnetization (M) on the same piece of PrFeAsO_0.6F_0.12 sample up to 1.1 GPa and observed T _c as well as the size of the Meissner signal to increase with pressure in this low-pressure region. In contrast, for an over-doped PrFeAsO_0.6F_0.14 sample, magnetization measurements up to 1.06 GPa show that both T _c and the Meissner signal decrease with pressure. The present study clearly reveals two distinct regions in the dome-shaped (T _c -P) phase diagram of PrFeAsO_0.6F_0.12.

Original language	English
Article number	11731
Journal	Scientific Reports
Volume	7
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-11927-1
State	Published - Dec 1 2017
Externally published	Yes

Funding

S.A. wishes to thank DST (SERB, FIST), DRDO, CEFIPRA AND BRNS for financial support. G.K.S. would like to thank UGC--BSR-RFSMS-SRF for the meritorious fellowship, K. M. thanks UGC-RGNF for fellowship.

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title = "Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14)",

abstract = "The effect of high pressure (up to 8 GPa) on normal and superconducting state properties of PrFeAsO0.6F0.12, an 1111-type iron based superconductor close to optimal doped region, has been investigated by measuring the temperature dependence of resistivity. Initially, the superconducting transition temperature (T c ) is observed to increase slowly by about 1 K as pressure (P) increases from 0 to 1.3 GPa. With further increase in pressure above 1.3 GPa, T c decreases at the rate of \textasciitilde{}1.5 K/GPa. The normal-state resistivity decreases monotonically up to 8 GPa. We have also measured the pressure dependence of magnetization (M) on the same piece of PrFeAsO0.6F0.12 sample up to 1.1 GPa and observed T c as well as the size of the Meissner signal to increase with pressure in this low-pressure region. In contrast, for an over-doped PrFeAsO0.6F0.14 sample, magnetization measurements up to 1.06 GPa show that both T c and the Meissner signal decrease with pressure. The present study clearly reveals two distinct regions in the dome-shaped (T c -P) phase diagram of PrFeAsO0.6F0.12.",

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T1 - Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14)

AU - Arumugam, S.

AU - Ganguli, C.

AU - Thiyagarajan, R.

AU - Bhoi, D.

AU - Selvan, G. Kalai

AU - Manikandan, K.

AU - Pariari, A.

AU - Mandal, P.

AU - Uwatoko, Y.

PY - 2017/12/1

Y1 - 2017/12/1

N2 - The effect of high pressure (up to 8 GPa) on normal and superconducting state properties of PrFeAsO0.6F0.12, an 1111-type iron based superconductor close to optimal doped region, has been investigated by measuring the temperature dependence of resistivity. Initially, the superconducting transition temperature (T c ) is observed to increase slowly by about 1 K as pressure (P) increases from 0 to 1.3 GPa. With further increase in pressure above 1.3 GPa, T c decreases at the rate of ~1.5 K/GPa. The normal-state resistivity decreases monotonically up to 8 GPa. We have also measured the pressure dependence of magnetization (M) on the same piece of PrFeAsO0.6F0.12 sample up to 1.1 GPa and observed T c as well as the size of the Meissner signal to increase with pressure in this low-pressure region. In contrast, for an over-doped PrFeAsO0.6F0.14 sample, magnetization measurements up to 1.06 GPa show that both T c and the Meissner signal decrease with pressure. The present study clearly reveals two distinct regions in the dome-shaped (T c -P) phase diagram of PrFeAsO0.6F0.12.

AB - The effect of high pressure (up to 8 GPa) on normal and superconducting state properties of PrFeAsO0.6F0.12, an 1111-type iron based superconductor close to optimal doped region, has been investigated by measuring the temperature dependence of resistivity. Initially, the superconducting transition temperature (T c ) is observed to increase slowly by about 1 K as pressure (P) increases from 0 to 1.3 GPa. With further increase in pressure above 1.3 GPa, T c decreases at the rate of ~1.5 K/GPa. The normal-state resistivity decreases monotonically up to 8 GPa. We have also measured the pressure dependence of magnetization (M) on the same piece of PrFeAsO0.6F0.12 sample up to 1.1 GPa and observed T c as well as the size of the Meissner signal to increase with pressure in this low-pressure region. In contrast, for an over-doped PrFeAsO0.6F0.14 sample, magnetization measurements up to 1.06 GPa show that both T c and the Meissner signal decrease with pressure. The present study clearly reveals two distinct regions in the dome-shaped (T c -P) phase diagram of PrFeAsO0.6F0.12.

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Effect of pressure on normal and superconducting state properties of iron based superconductor PrFeAsO0.6Fy (y = 0.12, 0.14)

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