Spin-phonon coupling in epitaxial Sr0.6Ba0.4MnO3 thin films

被引：10

作者：

Goian, V. ^{[1
]}

Langenberg, E. ^{[2
,3
]}

Marcano, N. ^{[2
,4
]}

Bovtun, V. ^{[1
]}

Maurel, L. ^{[3
,5
]}

Kempa, M. ^{[1
]}

Prokscha, T. ^{[6
]}

Kroupa, J. ^{[1
]}

Algarabel, P. A. ^{[2
,3
]}

Pardo, J. A. ^{[5
,7
,8
]}

Kamba, S. ^{[1
]}

机构：

[1] Czech Acad Sci, Inst Phys, Prague, Czech Republic

[2] Univ Zaragoza, CSIC, ICMA, E-50009 Zaragoza, Spain

[3] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[4] Acad Gen Mil, Ctr Univ Def, Zaragoza 50090, Spain

[5] Univ Zaragoza, INA, Zaragoza 50018, Spain

[6] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

[7] Univ Zaragoza, Lab Microscopias Avanzadas, Zaragoza 50018, Spain

[8] Univ Zaragoza, Dept Ciencia & Tecnol Mat & Fluidos, Zaragoza 50018, Spain

来源：

PHYSICAL REVIEW B | 2017年 / 95卷 / 07期

关键词：

SLOW POLARIZED MUONS; GENERATION; RELAXATION;

D O I：

10.1103/PhysRevB.95.075126

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin-phonon coupling is investigated in epitaxially strained Sr1-xBax MnO3 thin films with perovskite structure by means of microwave (MW) and infrared (IR) spectroscopy. In this work we focus on the Sr0.6Ba0.4MnO3 composition grown on LaAlO3)(0.3)Sr2AlTaO6)(0.7) substrate. The MW complex electromagnetic response shows a decrease in the real part and a clear anomaly in the imaginary part around 150 K. Moreover, it coincides with a 17% hardening of the lowest- frequency polar phonon seen in IR reflectance spectra. In order to further elucidate this phenomenon, low-energy muon-spin spectroscopy was carried out, signaling the emergence of antiferromagnetic order with Neel temperature (T-N) around 150 K. Thus, our results confirm that epitaxial Sr0.6Ba0.4MnO3 thin films display strong spin-phonon coupling below T-N, which may stimulate further research on tuning the magnetoelectric coupling by controlling the epitaxial strain and chemical pressure in the Sr1-xBaxMnO3 system.

引用

页数：7

共 34 条

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