Short-range antiferromagnetic interaction and spin-phonon coupling in La2CoMnO6 double perovskite

被引：4

作者：

Silva, R. X. ^{[1
,6
]}

Santos, C. C. ^{[2
]}

Reichlova, H. ^{[3
]}

Marti, X. ^{[3
,4
]}

Paniago, R. ^{[5
]}

Paschoal, C. W. A. ^{[6
]}

机构：

[1] Univ Fed Maranhao, Coordenacao Ciencias Nat, Campus 7, BR-65400000 Codo, MA, Brazil

[2] Univ Fed Maranhao, Dept Fis, CCET, BR-65080805 Sao Luis, Maranhao, Brazil

[3] ASCR, Inst Phys, Vvi, Cukrovarnicka 10, Prague 16253 6, Czech Republic

[4] CSIC ICN, CIN2, Barcelona 08193, Spain

[5] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-31270901 Belo Horizonte, MG, Brazil

[6] Univ Fed Ceara, Dept Fis, Campus Pici,POB 6030, BR-60455970 Fortaleza, Ceara, Brazil

来源：

VIBRATIONAL SPECTROSCOPY | 2022年 / 123卷

关键词：

Raman spectroscopy; Spin-phonon coupling; Double perovskites; Antisite disorder; ROOM-TEMPERATURE; BAND-GAP; PHASE; SPECTROSCOPY; ND; CA;

D O I：

10.1016/j.vibspec.2022.103426

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Weak antiferromagnetic (AFM) interaction in the ferromagnetic (FM) partially ordered La2CoMnO6 (LCMO) was detected by Raman spectroscopy by monitoring spin-phonon coupling. Because of the sensibility to probe short-range disorder and lattice modifications, the Raman spectroscopy showed to be an useful tool to indicate less remarkable magnetic transitions in LCMO compound. Apart from the expected spin-phonon coupling due to the long-range FM superexchange (T-c similar to 230 K), phonons parameters pointed out an additional spin-phonon coupling related to the short-range AFM interaction at Tc similar to 135 K, which was not detected from the magnetic bulk response. These results reinforce the Raman spectroscopy as a powerful technique to detect antisite disorder into A(2)B'B''O-6 magnetic double perovskites, whose magnetic properties are driven by superexchange interactions.

引用

页数：6

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