Spin-locking effect in the nanoscale ordered perovskite cobaltite LaBaCo2O6

被引：42

作者：

Kundu, Asish K. ^{[1
]}

Rautama, E. -L. ^{[1
]}

Boullay, Ph. ^{[1
]}

Caignaert, V. ^{[1
]}

Pralong, V. ^{[1
]}

Raveau, B. ^{[1
]}

机构：

[1] CRISMAT Lab, F-14050 Caen, France

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.76.184432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A nanoscale ordered perovskite cobaltite, which consists of 90 degrees ordered domains of the layered "112" LaBaCo2O6, has been evidenced by high resolution-transmission electron microscopy. This form, such as the disordered La0.5Ba0.5CoO3 and ordered LaBaCo2O6, exhibits a ferromagnetic transition at T-C approximate to 179 K. However, it differs from the two previous forms by its strong magnetic anisotropy and, correlatively, by its high value of coercivity (4.2 kOe) at low temperature. We suggest that this behavior originates from the locking of magnetic spins in the 90 degrees oriented nanodomain. Moreover, one observes a semimetal to semimetal transition at T-C with a maximum magnetoresistance of similar to 6.5% at this temperature.

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共 24 条

[1] Competing electronic ground states in La1-xCaxCoO3 -: art. no. 054401 [J].

Burley, JC ;

Mitchell, JF ;

Short, S .

PHYSICAL REVIEW B, 2004, 69 (05)

[2] ELECTRON-SPECTROSCOPY STUDY OF THE SEMICONDUCTOR-METAL TRANSITION IN LA1-XSRXCOO3 [J].

CHAINANI, A ;

MATHEW, M ;

SARMA, DD .

PHYSICAL REVIEW B, 1992, 46 (16) :9976-9983

[3] Intermediate spin state of Co3+ and Co4+ ions in La0.5Ba0.5CoO3 evidenced by Jahn-Teller distortions -: art. no. 060401 [J].

Fauth, F ;

Suard, E ;

Caignaert, V .

PHYSICAL REVIEW B, 2002, 65 (06)

[4] Transport and magnetization in the badly metallic itinerant ferromagnet SrRuO3 [J].

Klein, L ;

Dodge, JS ;

Ahn, CH ;

Reiner, JW ;

Mieville, L ;

Geballe, TH ;

Beasley, MR ;

Kapitulnik, A .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1996, 8 (48) :10111-10126

[5] Anomalous spin scattering effects in the badly metallic itinerant ferromagnet SrRuO3 [J].

Klein, L ;

Dodge, JS ;

Ahn, CH ;

Snyder, GJ ;

Geballe, TH ;

Beasley, MR ;

Kapitulnik, A .

PHYSICAL REVIEW LETTERS, 1996, 77 (13) :2774-2777

[6] Intermediate-spin state and properties of LaCoO3 [J].

Korotin, MA ;

Ezhov, SY ;

Solovyev, IV ;

Anisimov, VI ;

Khomskii, DI ;

Sawatzky, GA .

PHYSICAL REVIEW B, 1996, 54 (08) :5309-5316

[7] Structure, magnetization, and resistivity of La1-xMxCoO3 (M = Ca, Sr, and Ba) -: art. no. 094417 [J].

Kriener, M ;

Zobel, C ;

Reichl, A ;

Baier, J ;

Cwik, M ;

Berggold, K ;

Kierspel, H ;

Zabara, O ;

Freimuth, A ;

Lorenz, T .

PHYSICAL REVIEW B, 2004, 69 (09)

[8] Nonequilibrium magnetic properties of single-crystalline La0.7Ca0.3CoO3 -: art. no. 144423 [J].

Kundu, AK ;

Nordblad, P ;

Rao, CNR .

PHYSICAL REVIEW B, 2005, 72 (14)

[9] Magnetic and electron transport properties of the rare earth cobaltates, La0.7-xLnxCa0.3CoO0.3 (Ln = Pr, Nd, Gd and Dy):: a case of phase separation [J].

Kundu, AK ;

Ramesha, K ;

Seshadri, R ;

Rao, CNR .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (45) :7955-7966

[10] Spin-glass behavior in Pr0.7Ca0.3CoO3 and Nd0.7Ca0.3CoO3 [J].

Kundu, AK ;

Nordblad, P ;

Rao, CNR .

JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (03) :923-927