Effect of reduced local lattice disorder on the magnetic properties of B-site substituted La0.8Sr0.2MnO3

被引：4

作者：

Ghorai, Sagar ^{[1
]}

Ivanov, Sergey A. ^{[1
,2
]}

Skini, Ridha ^{[1
]}

Strom, Petter ^{[3
]}

Svedlindh, Peter ^{[1
]}

机构：

[1] Uppsala Univ, Dept Mat Sci & Engn, Box 35, SE-75103 Uppsala, Sweden

[2] Semenov Inst Chem Phys, Kosygina St 4, Moscow 119991, Russia

[3] Uppsala Univ, Dept Phys & Astron, Appl Nucl Phys, Box 516, SE-75120 Uppsala, Sweden

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2021年 / 529卷

关键词：

Griffiths phase; Jahn-Teller effect; Dimerons; Magnetocaloric effect; Spin cluster state;

D O I：

10.1016/j.jmmm.2021.167893

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Disorder induced by chemical inhomogeneity and Jahn-Teller (JT) distortions is often observed in mixed valence perovskite manganites. The main reasons for the evolution of this disorder are connected with the cationic size differences and the ratio between JT active and non-JT active ions. The quenched disorder leads to a spin-cluster state above the magnetic transition temperature. The effect of Cu, a B-site substitution in the La0.8Sr0.2MnO3 compound, on the disordered phase has been addressed here. X-ray powder diffraction reveals rhombohedral (R-3c) structures for both the parent and B-site substituted compound with negligible change of lattice volume. The chemical compositions of the two compounds were verified by ion beam analysis technique. With the change of electronic bandwidth, the magnetic phase transition temperature has been tuned towards room temperature (318 K), an important requirement for room temperature magnetic refrigeration. However, a small decrease of the isothermal entropy change was observed with Cu-substitution, related to the decrease of the saturation magnetization.

引用

页数：7

共 42 条

[1] Potku - New analysis software for heavy ion elastic recoil detection analysis [J].

Arstila, K. ;

Julin, J. ;

Laitinen, M. I. ;

Aalto, J. ;

Konu, T. ;

Karkkainen, S. ;

Rahkonen, S. ;

Raunio, M. ;

Itkonen, J. ;

Santanen, J. -P. ;

Tuovinen, T. ;

Sajavaara, T. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2014, 331 :34-41

[2] ON A GENERALISED APPROACH TO 1ST AND 2ND ORDER MAGNETIC TRANSITIONS [J].

BANERJEE, SK .

PHYSICS LETTERS, 1964, 12 (01) :16-17

[3] Evolution from Griffiths like phase to non-Griffiths like phase with Y doping in (La1-xYx)0.7Ca0.3MnO3 [J].

Banik, Sanjib ;

Das, I .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2019, 469 :40-45

[4] NATURE OF THE GRIFFITHS PHASE [J].

BRAY, AJ .

PHYSICAL REVIEW LETTERS, 1987, 59 (05) :586-589

[5] Detailed relationship between local structure, polarons, and magnetization for La1-xCaxMnO3 (0.21 ≤ x ≤ 0.45) [J].

Bridges, F. ;

Downward, L. ;

Neumeier, J. J. ;

Tyson, T. A. .

PHYSICAL REVIEW B, 2010, 81 (18)

[6] Broadband magnetotransport in La0.6Sr0.4Mn1-xGaxO3 (0.0 ≤ x ≤ 0.3) at room temperature [J].

Chanda, A. ;

Chaudhuri, U. ;

Das, R. ;

Mahendiran, R. .

JOURNAL OF APPLIED PHYSICS, 2019, 126 (08)

[7] Observation of a Griffiths phase in paramagnetic La1-xSrxMnO3 -: art. no. 257202 [J].

Deisenhofer, J ;

Braak, D ;

von Nidda, HAK ;

Hemberger, J ;

Eremina, RM ;

Ivanshin, VA ;

Balbashov, AM ;

Jug, G ;

Loidl, A ;

Kimura, T ;

Tokura, Y .

PHYSICAL REVIEW LETTERS, 2005, 95 (25)

[8] Universal relationship between magnetization and changes in the local structure of La1-xCaxMnO3:: Evidence for magnetic dimers -: art. no. 106401 [J].

Downward, L ;

Bridges, F ;

Bushart, S ;

Neumeier, JJ ;

Dilley, N ;

Zhou, L .

PHYSICAL REVIEW LETTERS, 2005, 95 (10)

[9] Chemical potential shift and spectral-weight transfer in Pr1-xCaxMnO3 revealed by photoemission spectroscopy [J].

Ebata, K. ;

Wadati, H. ;

Takizawa, M. ;

Fujimori, A. ;

Chikamatsu, A. ;

Kumigashira, H. ;

Oshima, M. ;

Tomioka, Y. ;

Tokura, Y. .

PHYSICAL REVIEW B, 2006, 74 (06)

[10]

Fryns JP, 1993, ACTA PAEDIATR BELG, V31, P33

← 1 2 3 4 5 →