Sophia University

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20022010

most citedCritical exponent for the quantum Hall transition

152 citations

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cond-mat.str-el2009★ 37 cited

Gigantic magnetoelectric effect caused by magnetic-field-induced canted antiferromagnetic-paramagnetic transition in quasi-two-dimensional Ca $_{2}$ CoSi $_{2}$ O $_{7}$ crystal

M. Akaki, J. Tozawa, D. Akahoshi +1

We have investigated the magnetic and dielectric properties of Ca $_{2}$ CoSi $_{2}$ O $_{7}$ crystal. The dielectricity and magnetism of Ca $_{2}$ CoSi $_{2}$ O $_{7}$ are strongly coupled below a cant…

cond-mat.str-el2009★ 2 cited

Cr-doping effect on the orbital fluctuation of heavily doped Nd1-xSrxMnO3 (x ~ 0.625)

R. Tasaki, S. Fukushima, M. Akaki +2

We have investigated the Cr-doping effect of Nd0.375Sr0.625MnO3 near the phase boundary between the x2-y2 and 3z2-r2 orbital ordered states, where a ferromagnetic correlation and c…

cond-mat.str-el2009★ 8 cited

Persistent and Reversible Phase Control in GdMnO $_{3}$ near the Phase Boundary

H. Kuwahara, M. Akaki, J. Tozawa +3

We have investigated temperature and magnetic-field dependence of dielectric properties in the orthorhombic GdMnO $_{3}$ single crystal which is located near the phase boundary betwee…

cond-mat.str-el2009★ 26 cited

Magnetic and dielectric properties of A2CoSi2O7 (A=Ca, Sr, Ba) crystals

M. Akaki, J. Tozawa, D. Akahoshi +1

We have investigated the magnetic and dielectric properties of $A_{2}$ CoSi $_{2}$ O $_{7}$ ( $A$ =Ca, Sr, and Ba) crystals with a two-dimensional network of CoO $_{4}$ and SiO $_{4}$ tetrahedra con…

cond-mat.str-el2008

\muSR-dtected Soft mode toward a Possible Phase Transition in disordered spin gap system (CH3)2CHNH3-Cu(ClxBr1-x)3

T. Goto, T. Suzuki, I. Watanabe +4

Measurements of macroscopic properties have indicated that the bond-disordered spin-gap system (CH3)2CHNH3-Cu(ClxBr1-x)3 is gapless when x is between 0.44 and 0.87. Using muon spin…

cond-mat.str-el2008★ 3 cited

Chemical potential landscape in band filling and bandwidth-control of manganites: Photoemission spectroscopy measurements

K. Ebata, M. Takizawa, A. Fujimori +3

We have studied the effects of band filling and bandwidth control on the chemical potential in perovskite manganites $R_{1 - x} A_{x}$ MnO $_{3}$ ( $R$ : rare earth, $A$ : alkaline earth) by…

Gigantic magnetoelectric effect caused by magnetic-field-induced canted antiferromagnetic-paramagnetic transition in quasi-two-dimensional Ca2​CoSi2​O7​ crystal