Pressure effect on Bi0.4Ca0.6Mn1-xRu xO3 manganite: Enhanced ferromagnetism and collapsed exchange bias

I. Fita; V. Markovich; A. Wisniewski; R. Puzniak; R. Mahendiran; G. Gorodetsky

doi:10.1063/1.4762005

Pressure effect on Bi_0.4Ca_0.6Mn_1-xRu _xO₃ manganite: Enhanced ferromagnetism and collapsed exchange bias

I. Fita, V. Markovich, A. Wisniewski, R. Puzniak, R. Mahendiran, G. Gorodetsky

Department of Physics

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Pressure effect on magnetic state of Ru-doped charge-ordered manganite Bi_0.4Ca_0.6Mn_{1 -} _xRu _xO₃ (x=0.1, 0.2) was investigated by magnetization measurements in the temperature range of 5-315 K and under pressure up to ∼10 kbar. It was found that the x=0.2 composition is basically ferromagnetic (FM) while the low-doped (x=0.1) one exhibits a FM cluster glass behavior and exchange bias (EB) effect at low temperatures. Bi_0.4Ca _0.6Mn_0.9Ru_0.1O₃ demonstrates a substantial pressure-enhanced ferromagnetism, evidenced by ∼70 increase in spontaneous magnetization at 10 K under 10.3 kbar. It appears that an applied pressure strongly increases the FM to antiferromagnetic (AFM) phase ratio in the sample, leading to a notable decrease in both coercive field H_C and EB field H_E (H_C and H_E at 10 K decrease under pressure of ∼10 kbar by about 40 and 50%, respectively). The pressure-induced changes are qualitatively described within the simple model for FM size-variable clusters embedded in an AFM matrix. It is argued that both Ru-doping and external pressure act similarly, leading to a growth of the FM phase volume.

Original language	English
Article number	093908
Journal	Journal of Applied Physics
Volume	112
Issue number	9
DOIs	https://doi.org/10.1063/1.4762005
State	Published - 1 Nov 2012

ASJC Scopus subject areas

Physics and Astronomy (all)

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@article{a369778003d442efb95717ff8ca59fb1,

title = "Pressure effect on Bi0.4Ca0.6Mn1-xRu xO3 manganite: Enhanced ferromagnetism and collapsed exchange bias",

abstract = "Pressure effect on magnetic state of Ru-doped charge-ordered manganite Bi0.4Ca0.6Mn1 - xRu xO3 (x=0.1, 0.2) was investigated by magnetization measurements in the temperature range of 5-315 K and under pressure up to ∼10 kbar. It was found that the x=0.2 composition is basically ferromagnetic (FM) while the low-doped (x=0.1) one exhibits a FM cluster glass behavior and exchange bias (EB) effect at low temperatures. Bi0.4Ca 0.6Mn0.9Ru0.1O3 demonstrates a substantial pressure-enhanced ferromagnetism, evidenced by ∼70 increase in spontaneous magnetization at 10 K under 10.3 kbar. It appears that an applied pressure strongly increases the FM to antiferromagnetic (AFM) phase ratio in the sample, leading to a notable decrease in both coercive field HC and EB field HE (HC and HE at 10 K decrease under pressure of ∼10 kbar by about 40 and 50%, respectively). The pressure-induced changes are qualitatively described within the simple model for FM size-variable clusters embedded in an AFM matrix. It is argued that both Ru-doping and external pressure act similarly, leading to a growth of the FM phase volume.",

author = "I. Fita and V. Markovich and A. Wisniewski and R. Puzniak and R. Mahendiran and G. Gorodetsky",

note = "Funding Information: This work was supported in part by the Polish Ministry of Science and Higher Education under a research project no. N N202 1037 36 and by European Fund for Regional Development (Contract No. UDA-POIG.01.03.01-00-058/08-00). R.M. acknowledge National Research Foundation, Singapore (Grant no. NRF-CRP-G-2007-12) for supporting this work.",

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T2 - Enhanced ferromagnetism and collapsed exchange bias

AU - Fita, I.

AU - Markovich, V.

AU - Wisniewski, A.

AU - Puzniak, R.

AU - Mahendiran, R.

AU - Gorodetsky, G.

N1 - Funding Information: This work was supported in part by the Polish Ministry of Science and Higher Education under a research project no. N N202 1037 36 and by European Fund for Regional Development (Contract No. UDA-POIG.01.03.01-00-058/08-00). R.M. acknowledge National Research Foundation, Singapore (Grant no. NRF-CRP-G-2007-12) for supporting this work.

PY - 2012/11/1

Y1 - 2012/11/1

N2 - Pressure effect on magnetic state of Ru-doped charge-ordered manganite Bi0.4Ca0.6Mn1 - xRu xO3 (x=0.1, 0.2) was investigated by magnetization measurements in the temperature range of 5-315 K and under pressure up to ∼10 kbar. It was found that the x=0.2 composition is basically ferromagnetic (FM) while the low-doped (x=0.1) one exhibits a FM cluster glass behavior and exchange bias (EB) effect at low temperatures. Bi0.4Ca 0.6Mn0.9Ru0.1O3 demonstrates a substantial pressure-enhanced ferromagnetism, evidenced by ∼70 increase in spontaneous magnetization at 10 K under 10.3 kbar. It appears that an applied pressure strongly increases the FM to antiferromagnetic (AFM) phase ratio in the sample, leading to a notable decrease in both coercive field HC and EB field HE (HC and HE at 10 K decrease under pressure of ∼10 kbar by about 40 and 50%, respectively). The pressure-induced changes are qualitatively described within the simple model for FM size-variable clusters embedded in an AFM matrix. It is argued that both Ru-doping and external pressure act similarly, leading to a growth of the FM phase volume.

AB - Pressure effect on magnetic state of Ru-doped charge-ordered manganite Bi0.4Ca0.6Mn1 - xRu xO3 (x=0.1, 0.2) was investigated by magnetization measurements in the temperature range of 5-315 K and under pressure up to ∼10 kbar. It was found that the x=0.2 composition is basically ferromagnetic (FM) while the low-doped (x=0.1) one exhibits a FM cluster glass behavior and exchange bias (EB) effect at low temperatures. Bi0.4Ca 0.6Mn0.9Ru0.1O3 demonstrates a substantial pressure-enhanced ferromagnetism, evidenced by ∼70 increase in spontaneous magnetization at 10 K under 10.3 kbar. It appears that an applied pressure strongly increases the FM to antiferromagnetic (AFM) phase ratio in the sample, leading to a notable decrease in both coercive field HC and EB field HE (HC and HE at 10 K decrease under pressure of ∼10 kbar by about 40 and 50%, respectively). The pressure-induced changes are qualitatively described within the simple model for FM size-variable clusters embedded in an AFM matrix. It is argued that both Ru-doping and external pressure act similarly, leading to a growth of the FM phase volume.

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Pressure effect on Bi_0.4Ca_0.6Mn_1-xRu _xO₃ manganite: Enhanced ferromagnetism and collapsed exchange bias

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