Dynamics of electron density, spin-phonon coupling, and dielectric properties of SmFeO3 nanoparticles at the spin-reorientation temperature: Role of exchange striction

被引:84
作者
Chaturvedi, Smita [1 ]
Shyam, Priyank [1 ]
Apte, Amey [1 ,4 ]
Kumar, Jitender [1 ]
Bhattacharyya, Arpan [2 ]
Awasthi, A. M. [3 ]
Kulkarni, Sulabha [1 ]
机构
[1] Indian Inst Sci Educ & Res, Dr Homi Bhabha Rd, Pune, Maharashtra, India
[2] Saha Inst Nucl Phys, 1 AF Bidhannagar, Kolkata, India
[3] UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore, India
[4] Rice Univ, Houston, TX USA
关键词
RARE-EARTH; X-RAY; MAGNETIC-PROPERTIES; RAMAN-SPECTROSCOPY; CRYSTAL-STRUCTURE; PEROVSKITES; EVOLUTION; CHROMITES; VISCOSITY; FERRITES;
D O I
10.1103/PhysRevB.93.174117
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Samarium orthoferrite (SmFeO3) has been the subject of debate on the existence or nonexistence of ferroelectric properties. It has a high spin-reorientation transition temperature T-SR (480 K). Detailed synchrotron x-ray diffraction and Raman spectroscopy dielectric investigations in the 300 to 600 K temperature range of SmFeO3 nanoparticles (similar to 65 nm) have been performed. Raman spectroscopy established the existence of strong spin-phonon coupling and magnetostriction in the system. Magnetic measurements showed a spin-reorientation transition region from 480 to 450 K similar to that of a single crystal. The dielectric constant confirmed a clear anomaly around T-SR. The signature of unusual relaxor ferroelectric behavior in SmFeO3 nanoparticles from 380 to 480 K was observed in the dielectric properties. The electron density plots obtained using Rietveld refinement of the synchrotron x-ray diffraction data showed the displacement of the Sm and Fe ions, which can play a key role in the anomalous behavior at T-SR. The analysis indicated the presence of magnetoelectric coupling due to the exchange interaction between Sm and Fe spins in SmFeO3 nanoparticles.
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页数:12
相关论文
共 53 条
[11]   Coercivity and exchange bias of bismuth ferrite nanoparticles isolated by polymer coating [J].
Chaturvedi, Smita ;
Shirolkar, Mandar M. ;
Rajendra, Ranguwar ;
Singh, Surjeet ;
Ballav, Nirmalya ;
Kulkarni, Sulabha .
JOURNAL OF APPLIED PHYSICS, 2014, 115 (12)
[12]   Interface Strain-Induced Multiferroicity in a SmFeO3 Film [J].
Cheng, Zhenxiang ;
Hong, Fang ;
Wang, Yuanxu ;
Ozawa, Kiyoshi ;
Fujii, Hiroki ;
Kimura, Hideo ;
Du, Yi ;
Wang, Xiaolin ;
Dou, Shixue .
ACS APPLIED MATERIALS & INTERFACES, 2014, 6 (10) :7356-7362
[13]   MAGNETO-OPTICAL PROPERTIES OF SAMARIUM ORTHOFERRITE IN SPIN-REORIENTATION REGION [J].
FINKFINOWICKI, J .
PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1976, 74 (01) :K27-K29
[14]   Ultralow temperature terahertz magnetic thermodynamics of perovskite-like SmFeO3 ceramic [J].
Fu, Xiaojian ;
Zeng, Xinxi ;
Wang, Dongyang ;
Zhang, Hao Chi ;
Han, Jiaguang ;
Cui, Tie Jun .
SCIENTIFIC REPORTS, 2015, 5
[15]   Analysis of recent measurements of the viscosity of glasses [J].
Fulcher, GS .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1925, 8 (06) :339-355
[16]   Magnetic ordering effects in the Raman spectra of La1-xMn1-xO3 [J].
Granado, E ;
García, A ;
Sanjurjo, JA ;
Rettori, C ;
Torriani, I ;
Prado, F ;
Sánchez, RD ;
Caneiro, A ;
Oseroff, SB .
PHYSICAL REVIEW B, 1999, 60 (17) :11879-11882
[17]   Lattice dynamic investigation of Raman and infrared wavenumbers at the zone center of orthorhombic RFeO3 (R = Tb, Dy, Ho, Er, Tm) perovskites [J].
Gupta, HC ;
Singh, MK ;
Tiwari, LM .
JOURNAL OF RAMAN SPECTROSCOPY, 2002, 33 (01) :67-70
[18]  
Hill NA, 2002, J MAGN MAGN MATER, V242, P976
[19]  
Hill NA, 2000, J PHYS CHEM B, V104, P6694, DOI 10.1021/jpc00114x
[20]   Selected multiferroic perovskite oxides containing rare earth and transition metal elements [J].
Hu, Shunbo ;
Chen, Lei ;
Wu, Yabei ;
Yu, Liming ;
Zhao, Xinluo ;
Cao, Shixun ;
Zhang, Jincang ;
Ren, Wei .
CHINESE SCIENCE BULLETIN, 2014, 59 (36) :5170-5179