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Electric quadrupolar state in a frustrated quantum magnet $\rm Tb_{2+\it \delta}Ti_{2-\it \delta}O_7$ has been studied by means of ultrasonic and magnetostriction measurements. A single crystal showed elastic anomaly at about 0.4 K, manifesting a lon
Externí odkaz:
http://arxiv.org/abs/2109.11876
Publikováno v:
Phys. Rev. Lett. 126, 177205 (2021)
Chirality in a helimagnetic structure is determined by the sense of magnetic moment rotation. We found that the chiral information did not disappear even after the phase transition to the high-temperature ferromagnetic phase in a helimagnet MnP. The
Externí odkaz:
http://arxiv.org/abs/2010.02491
The angular momentum interconversion between electron spin and other type of angular momenta is useful to develop new spintronic functionalities. The conversions from the angular momentum of photon and mechanical rotation to ferromagnetic spin moment
Externí odkaz:
http://arxiv.org/abs/2007.03192
Chirality is breaking of mirror symmetry in matter. In the fields of biology and chemistry, this is particularly important because some of the essential molecules in life such as amino acids and DNA have chirality. It is a long-standing mystery how o
Externí odkaz:
http://arxiv.org/abs/1907.01798
Publikováno v:
Phys. Rev. B 99, 014418 (2019)
We observed surface acoustic wave (SAW) propagation on a multiferroic material CuB$_2$O$_4$ with use of two interdigital transducers (IDTs). The period of IDT fingers is as short as 1.6 $\mu$m so that the frequency of SAW is 3 GHz, which is comparabl
Externí odkaz:
http://arxiv.org/abs/1811.01527
Publikováno v:
Phys. Rev. B 98, 064416 (2018)
We have investigated the microwave non-reciprocity for a non-centrosymmetric antiferromagnet Ba$_2$MnGe$_2$O$_7$. The magnon modes expected by the conventional spin wave theory for staggered antiferromagnets are certainly observed. The magnitudes of
Externí odkaz:
http://arxiv.org/abs/1804.03250
Publikováno v:
Phys. Rev. B 96, 144435 (2017)
We have investigated anomalous Hall effect and magnetoresistance in a noncentrosymmetric itinerant magnet Cr$_{11}$Ge$_{19}$. While the temperature- and magnetic-field-dependent anomalous Hall conductivity is just proportional to the magnetization ab
Externí odkaz:
http://arxiv.org/abs/1705.06026
Control of physical property in terms of external fields is essential for contemporary technologies. The conductance can be controlled by a gate electric field in a field effect transistor, which is a main component of the integrated circuit. Optical
Externí odkaz:
http://arxiv.org/abs/1607.06889
We have investigated microwave nonreciprocity in a noncentro-symmetric magnet CuB2O4. We simultaneously observed differently originated nonreciprocities; the classical magnetic dipolar effect and the magneto-chiral (MCh) effect. By rotating magnetic
Externí odkaz:
http://arxiv.org/abs/1605.07414
Publikováno v:
Phys. Rev. B 95, 020407 (2017)
We have investigated surface acoustic wave propagation in Ni/LiNbO$_3$ hybrid devices. We have found the absorption and phase velocity are dependent on the sign of wave vector in a device, which indicates the nonreciprocal propagation characteristic
Externí odkaz:
http://arxiv.org/abs/1605.04058