Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3

S. Raut; S. Chakravarty; H. S. Mohanty; S. Mahapatra; S. Bhardwaj; A. M. Awasthi; B. Kar; K. Singh; M. Chandra; A. Lakhani; V. Ganesan; M. Mishra Patidar; R. K. Sharma; Velaga Srihari; H. K. Poswal; S. Mukherjee; S. Giri; S. Panigrahi

doi:10.1016/j.jmmm.2022.169950

Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm_0.5Y_0.5Fe_0.58Mn_0.42O₃

S. Raut
, S. Chakravarty
, H. S. Mohanty
, S. Mahapatra
, S. Bhardwaj
, A. M. Awasthi
, B. Kar
, K. Singh
, M. Chandra
, A. Lakhani
, V. Ganesan
, M. Mishra Patidar
, R. K. Sharma
, Velaga Srihari
, H. K. Poswal
, S. Mukherjee
, S. Giri
, S. Panigrahi

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

3 Scopus citations

Abstract

The specific-heat and exchange bias effects in polycrystalline Sm_0.5Y_0.5Fe_0.58Mn_0.42O₃ [SYFM (58–42)] have been investigated within the temperature interval of 2–300 K. Specific-heat measurements as a function of temperature have revealed a sizable linear contribution at low temperature that may be associated with the glassy magnetic ordering, alongwith a diffused Schottky peak over a wide temperature range between 2 and 20 K. The observed distribution of Schottky levels is explained by the inhomogeneity of the molecular field in the spinglass (SG) state that leads to variable splitting of the Kramer's ground-state doublets in Sm^{3 +} ions. A finite zero field exchange bias (EB) effect have been observed at low temperatures for T < 70 K. The field dependency of the exchange bias showed the tuning of the sign of EB that can be attributed to the competition of the interfacial exchange bias and atomic EB arising from the cooling field induced anisotropy of the weak ferromagnetic moments of the constituent ions of Fe³⁺/Mn³⁺.

Original language	English
Article number	169950
Journal	Journal of Magnetism and Magnetic Materials
Volume	563
DOIs	https://doi.org/10.1016/j.jmmm.2022.169950
State	Published - Dec 1 2022
Externally published	Yes

Funding

We acknowledges UGC-DAE CSR Indore for measurement support. S.R. and S.P. also acknowledges Mr. Balram Thakur for helping in SQUID-VSM measurements in UGC-DAE CSR Kalapakkam Node. The whole work was supported by the Ministry of Human Resource and Development (MHRD), India, under the indigenous fellowship scheme. This work is also partially funded by project approved under collaborative research scheme (UGC DAE- CRS) vide project no.: CSR-IC-255/2017-18/1336 dated 31-03- 2018. We acknowledges UGC-DAE CSR Indore for measurement support. S.R. and S.P. also acknowledges Mr. Balram Thakur for helping in SQUID-VSM measurements in UGC-DAE CSR Kalapakkam Node. The whole work was supported by the Ministry of Human Resource and Development (MHRD), India, under the indigenous fellowship scheme. This work is also partially funded by project approved under collaborative research scheme (UGC DAE- CRS) vide project no.: CSR-IC-255/2017-18/1336 dated 31-03- 2018. The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Simanchalo Panigrahi reports financial support, equipment, drugs, or supplies, and travel were provided by University Grants Commission Department of Atomic Energy Consortium for Scientific Research. Simanchalo Panigrahi reports a relationship with University Grants Commission Department of Atomic Energy Consortium for Scientific Research that includes: consulting or advisory and funding grants.

Keywords

Exchange bias effect
Specific heat
Weak ferromagnetism

Access to Document

10.1016/j.jmmm.2022.169950

Cite this

Raut, S., Chakravarty, S., Mohanty, H. S., Mahapatra, S., Bhardwaj, S., Awasthi, A. M., Kar, B., Singh, K., Chandra, M., Lakhani, A., Ganesan, V., Mishra Patidar, M., Sharma, R. K., Srihari, V., Poswal, H. K., Mukherjee, S., Giri, S., & Panigrahi, S. (2022). Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm_0.5Y_0.5Fe_0.58Mn_0.42O₃. Journal of Magnetism and Magnetic Materials, 563, Article 169950. https://doi.org/10.1016/j.jmmm.2022.169950

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title = "Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3",

abstract = "The specific-heat and exchange bias effects in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 [SYFM (58–42)] have been investigated within the temperature interval of 2–300 K. Specific-heat measurements as a function of temperature have revealed a sizable linear contribution at low temperature that may be associated with the glassy magnetic ordering, alongwith a diffused Schottky peak over a wide temperature range between 2 and 20 K. The observed distribution of Schottky levels is explained by the inhomogeneity of the molecular field in the spinglass (SG) state that leads to variable splitting of the Kramer's ground-state doublets in Sm3 + ions. A finite zero field exchange bias (EB) effect have been observed at low temperatures for T < 70 K. The field dependency of the exchange bias showed the tuning of the sign of EB that can be attributed to the competition of the interfacial exchange bias and atomic EB arising from the cooling field induced anisotropy of the weak ferromagnetic moments of the constituent ions of Fe3+/Mn3+.",

keywords = "Exchange bias effect, Specific heat, Weak ferromagnetism",

author = "S. Raut and S. Chakravarty and Mohanty, \{H. S.\} and S. Mahapatra and S. Bhardwaj and Awasthi, \{A. M.\} and B. Kar and K. Singh and M. Chandra and A. Lakhani and V. Ganesan and \{Mishra Patidar\}, M. and Sharma, \{R. K.\} and Velaga Srihari and Poswal, \{H. K.\} and S. Mukherjee and S. Giri and S. Panigrahi",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = dec,

day = "1",

doi = "10.1016/j.jmmm.2022.169950",

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Raut, S, Chakravarty, S, Mohanty, HS, Mahapatra, S, Bhardwaj, S, Awasthi, AM, Kar, B, Singh, K, Chandra, M, Lakhani, A, Ganesan, V, Mishra Patidar, M, Sharma, RK, Srihari, V, Poswal, HK, Mukherjee, S, Giri, S & Panigrahi, S 2022, 'Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm_0.5Y_0.5Fe_0.58Mn_0.42O₃', Journal of Magnetism and Magnetic Materials, vol. 563, 169950. https://doi.org/10.1016/j.jmmm.2022.169950

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T1 - Effect of reentrant spinglass-like states on Schottky Anomaly and exchange bias in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3

AU - Raut, S.

AU - Chakravarty, S.

AU - Mohanty, H. S.

AU - Mahapatra, S.

AU - Bhardwaj, S.

AU - Awasthi, A. M.

AU - Kar, B.

AU - Singh, K.

AU - Chandra, M.

AU - Lakhani, A.

AU - Ganesan, V.

AU - Mishra Patidar, M.

AU - Sharma, R. K.

AU - Srihari, Velaga

AU - Poswal, H. K.

AU - Mukherjee, S.

AU - Giri, S.

AU - Panigrahi, S.

PY - 2022/12/1

Y1 - 2022/12/1

N2 - The specific-heat and exchange bias effects in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 [SYFM (58–42)] have been investigated within the temperature interval of 2–300 K. Specific-heat measurements as a function of temperature have revealed a sizable linear contribution at low temperature that may be associated with the glassy magnetic ordering, alongwith a diffused Schottky peak over a wide temperature range between 2 and 20 K. The observed distribution of Schottky levels is explained by the inhomogeneity of the molecular field in the spinglass (SG) state that leads to variable splitting of the Kramer's ground-state doublets in Sm3 + ions. A finite zero field exchange bias (EB) effect have been observed at low temperatures for T < 70 K. The field dependency of the exchange bias showed the tuning of the sign of EB that can be attributed to the competition of the interfacial exchange bias and atomic EB arising from the cooling field induced anisotropy of the weak ferromagnetic moments of the constituent ions of Fe3+/Mn3+.

AB - The specific-heat and exchange bias effects in polycrystalline Sm0.5Y0.5Fe0.58Mn0.42O3 [SYFM (58–42)] have been investigated within the temperature interval of 2–300 K. Specific-heat measurements as a function of temperature have revealed a sizable linear contribution at low temperature that may be associated with the glassy magnetic ordering, alongwith a diffused Schottky peak over a wide temperature range between 2 and 20 K. The observed distribution of Schottky levels is explained by the inhomogeneity of the molecular field in the spinglass (SG) state that leads to variable splitting of the Kramer's ground-state doublets in Sm3 + ions. A finite zero field exchange bias (EB) effect have been observed at low temperatures for T < 70 K. The field dependency of the exchange bias showed the tuning of the sign of EB that can be attributed to the competition of the interfacial exchange bias and atomic EB arising from the cooling field induced anisotropy of the weak ferromagnetic moments of the constituent ions of Fe3+/Mn3+.

KW - Exchange bias effect

KW - Specific heat

KW - Weak ferromagnetism

UR - https://www.scopus.com/pages/publications/85138454020

U2 - 10.1016/j.jmmm.2022.169950

DO - 10.1016/j.jmmm.2022.169950

M3 - Article

AN - SCOPUS:85138454020

SN - 0304-8853

VL - 563

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

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ER -